mysterious figures behind the surgery room glass - towards the unknown stock videos & royalty-free footage00:12Mysterious figures behind the surgery room glassMystery, Hospital, Hospital Ward
questions marks animated 4k. - chroma key -loopable - towards the unknown stock videos & royalty-free footage00:13Questions Marks Animated 4K. - Chroma Key -LoopableQuestion Mark, Mystery, Backgrounds
cu male hands looking at secret documents during a meeting; 1964 - towards the unknown stock videos & royalty-free footage00:08CU male hands looking at secret documents during a meeting; 1964Privacy, Document, Mystery
mouth, zoom and woman with finger on lips for secret, quiet or no noise gesture closeup. half, face and female person with emoji hand expression for privacy, news or confidential, gossip or whisper - towards the unknown stock videos & royalty-free footage00:12Mouth, zoom and woman with finger on lips for secret, quiet or no noise gesture closeup. Half, face and female person with emoji hand expression for privacy, news or confidential, gossip or whisperFinger on Lips, Whispering, Privacy
unknown call - towards the unknown stock videos & royalty-free footage00:14Unknown callMystery, Phishing, Number
unknown caller scam - towards the unknown stock videos & royalty-free footage00:13unknown caller ScamScammer, Phone Spam, Mystery
typing on keyboard! - towards the unknown stock videos & royalty-free footage00:09Typing on keyboard!Typing, Internet, Computer
flying slowly just above the surface of the water at sunrise along the reflection of the sun in the water. following the sun. sunset at sea. the dolly shot. version 4a - towards the unknown stock videos & royalty-free footage00:20Flying slowly just above the surface of the water at sunrise along the reflection of the sun in the water. Following the sun. Sunset at sea. The dolly shot. Version 4aSea, Sunset, Above
man with light beam illuminating dark underground tunnel system - towards the unknown stock videos & royalty-free footage00:29Man with Light beam illuminating dark underground tunnel systemSpooky, Tunnel, Underground
through the tunnel: a journey from darkness to light - towards the unknown stock videos & royalty-free footage00:15Through the Tunnel: A Journey from Darkness to LightMystery, Tunnel, Journey
slo mo, ecu, young woman with finger on lips - towards the unknown stock videos & royalty-free footage00:08SLO MO, ECU, Young woman with finger on lipsFinger on Lips, Silence, Mystery
ws overhead - man in hoodie walks down dark alleyway - towards the unknown stock videos & royalty-free footage00:15WS Overhead - man in hoodie walks down dark alleywayWalking, Alley, Mystery
unknown call - towards the unknown stock videos & royalty-free footage00:16Unknown callTelephone, Phishing, Mystery
b/w 1942 close up woman whispering into other woman's ear / "divide and conquer" (documentary) - towards the unknown stock videos & royalty-free footage00:10B/W 1942 close up woman whispering into other woman's ear / "Divide and Conquer" (documentary)Whispering, Mystery, Gossip
walking into the era of digital evolution - towards the unknown stock videos & royalty-free footage00:12Walking Into the Era of Digital EvolutionFuturistic, The Way Forward, Technology
mystical forest. treetops view from the bottom. - towards the unknown stock videos & royalty-free footage00:15Mystical forest. Treetops view from the bottom.Forest, Dark, Night
medium shot silhouetted blonde woman - towards the unknown stock videos & royalty-free footage00:10Medium shot silhouetted blonde womanMystery, Privacy, Victim
locked vault opening animation - towards the unknown stock videos & royalty-free footage00:10Locked Vault Opening AnimationOpening
old postcards,a family history resource - towards the unknown stock videos & royalty-free footage00:57Old postcards,A family history resourceSerbia and Montenegro
magic book with animation glowing letters - towards the unknown stock videos & royalty-free footage00:30Magic book with animation glowing lettersBook, Paranormal, Text
loopable cloudscape - flying towards the moon - cloud background - night sky, full moon and stars - towards the unknown stock videos & royalty-free footage00:10Loopable Cloudscape - Flying Towards The Moon - Cloud Background - Night Sky, Full Moon And StarsHalloween, Night, Backgrounds
blackboard and eyes - towards the unknown stock videos & royalty-free footage00:09blackboard and eyesQuestion Mark, Confusion, Choice
2d animation of a ghost - towards the unknown stock videos & royalty-free footage00:092D animation of a GhostQuestion Mark, Mystery, Ghost
morning majestic fog beams through forest aerial view - towards the unknown stock videos & royalty-free footage00:18Morning majestic fog beams through forest aerial viewMountain, Fog, Forest
medium shot silhouetted man turning head - towards the unknown stock videos & royalty-free footage00:14Medium shot silhouetted man turning headWitness, Criminal, Mystery
b/w 1942 extreme close up man whispering into other man's ear / "divide and conquer" (documentary) - towards the unknown stock videos & royalty-free footage00:08B/W 1942 extreme close up man whispering into other man's ear / "Divide and Conquer" (documentary)Whispering, Mystery, Gossip
thai young man come straight to light in nightmare - towards the unknown stock videos & royalty-free footage00:12Thai young man come straight to light in nightmareMen, Walking, Shadow
unknown call scammer - towards the unknown stock videos & royalty-free footage00:15Unknown Call scammerWhite Collar Crime, Scammer, Hoax
shy, sensual touch. underwater romance - towards the unknown stock videos & royalty-free footage00:07Shy, sensual touch. Underwater romanceTouching, Couple - Relationship, Sensuality
searching for top secret classified files. - towards the unknown stock videos & royalty-free footage00:12Searching for Top Secret classified files.Privacy, Mystery, Document
mystical wild gloomy forest. gloomy silhouettes of trees against the background of moonlight breaking through the crowns of large trees. - towards the unknown stock videos & royalty-free footage00:20Mystical wild gloomy forest. Gloomy silhouettes of trees against the background of moonlight breaking through the crowns of large trees.Forest, Spooky, Dark
questions marks animated on green screen. 4k. - chroma key -loopable - towards the unknown stock videos & royalty-free footage00:11Questions Marks Animated on Green Screen. 4K. - Chroma Key -LoopableQuestion Mark, Q and A, Green Background
hyperlapse of god light with mountain landscape - towards the unknown stock videos & royalty-free footage00:07Hyperlapse of God light with mountain landscapeLong Exposure, Time Lapse, Nature
silhouette of a young woman at home interior in evening against a window sad lonely - towards the unknown stock videos & royalty-free footage00:25Silhouette of a young woman at home interior in evening against a window sad lonelySpooky, House, Loneliness
fog on countryside woodland, italy - towards the unknown stock videos & royalty-free footage00:25Fog on countryside woodland, ItalyForest, Fog, Nature
smoke in a black background, white exhaust smoke, black background - towards the unknown stock videos & royalty-free footage00:20Smoke in a black background, white exhaust smoke, black backgroundSmoke, Fog, Black Background
unknown businessman examining and signing documents - towards the unknown stock videos & royalty-free footage00:12unknown businessman examining and signing documentsSigning, Document, Authority
abstract white smoke, fog, steam clouds over black background. 4k stock video - towards the unknown stock videos & royalty-free footage00:20Abstract White Smoke, Fog, Steam Clouds over Black Background. 4K stock videoSmoke, Fog, Steam
ws passageway with stone walls in kheops pyramid / giza, egypt - towards the unknown stock videos & royalty-free footage00:09WS Passageway with stone walls in Kheops Pyramid / Giza, EgyptTunnel, Indoors, Pyramid
hacker standing alone in dark room - towards the unknown stock videos & royalty-free footage00:12Hacker standing alone in dark roomSuspicion, Men, Mystery
passage along the path in a moonlight in a forest at night - towards the unknown stock videos & royalty-free footage00:20Passage along the path in a moonlight in a forest at nightForest, Night, Spooky
opening a door to house with key,close-up - towards the unknown stock videos & royalty-free footage00:09Opening a door to house with key,close-upKey, Lock, Opening
blue particles moving horizontally - loop - towards the unknown stock videos & royalty-free footage00:28Blue Particles Moving Horizontally - LoopBackgrounds, Particle, Abstract
ms sillouette of man in hoodie walks down a dark salleyway and knocks on a door - towards the unknown stock videos & royalty-free footage00:12MS Sillouette of man in hoodie walks down a dark salleyway and knocks on a doorDark, Hood - Clothing, Mystery
a man carefully draws a map with a feather - 4k stok video - towards the unknown stock videos & royalty-free footage00:14A man carefully draws a map with a feather - 4K Stok VideoAncient, Handwriting, 18th Century
woman walking through eucalyptus forest in fog - towards the unknown stock videos & royalty-free footage00:08Woman walking through eucalyptus forest in fogWalking, Forest, Woodland
silhouettes of two men talking in shadow of bridge; 1958 - towards the unknown stock videos & royalty-free footage00:15Silhouettes of two men talking in shadow of bridge; 1958Spy, The Past, Focus on Shadow
unknown is calling as a missed call - towards the unknown stock videos & royalty-free footage00:16Unknown is Calling as a missed callTelephone, Mystery
medium shot silhouetted man with eyeglasses and curly hair - towards the unknown stock videos & royalty-free footage00:14Medium shot silhouetted man with eyeglasses and curly hairMystery, One Person, Witness
anonymous silhouette of man speaking – hidden identity interview style - towards the unknown stock videos & royalty-free footage00:40Anonymous Silhouette of Man Speaking – Hidden Identity Interview StylePeople, One Person, Mystery
video of a shadow of a man walking towards a door - towards the unknown stock videos & royalty-free footage00:04Video of a shadow of a man walking towards a doorMystery, Shadow, Men
illuminating his path to the unknown - towards the unknown stock videos & royalty-free footage00:28Illuminating his path to the unknownDiscovery, Mystery, Lantern
fog in the forest in rain day - towards the unknown stock videos & royalty-free footage00:08Fog in the forest in rain dayForest, Fog, Dark
spooky dark forest at night in moonlight - towards the unknown stock videos & royalty-free footage00:30Spooky Dark Forest at Night in MoonlightForest, Dark, Fog
young woman walking on foggy road lonely - towards the unknown stock videos & royalty-free footage00:12Young woman walking on foggy road lonelyGhost, Walking, Woodland
1957 animation close up hands of a fortune teller waving around a crystal ball - towards the unknown stock videos & royalty-free footage00:031957 ANIMATION close up hands of a fortune teller waving around a crystal ballCrystal Ball, Fortune Teller, Mystery
ws la view of woman waiting for man on bridge - towards the unknown stock videos & royalty-free footage00:28WS LA View of Woman waiting for man on bridgePrivacy, Meeting, Mystery
ms man checks written document at desk in suit; 1968 - towards the unknown stock videos & royalty-free footage00:10MS man checks written document at desk in suit; 1968Signing, Contract, 1960-1969
silhouetted person walks through dark alleyway - towards the unknown stock videos & royalty-free footage00:18Silhouetted person walks through dark alleywayDark, Alley, Detective
slow motion of fashion woman walking against light at night - towards the unknown stock videos & royalty-free footage00:26Slow motion of fashion woman walking against light at nightMystery, Spotlight, Spot Lit
smoke slowly drifts over a bed of water. - towards the unknown stock videos & royalty-free footage00:50Smoke slowly drifts over a bed of water.Smoke, Fog, Cloud - Sky
woman walking in the dark with a light in the distance - towards the unknown stock videos & royalty-free footage00:09Woman walking in the dark with a light in the distanceFog, Women, People
receiving call from unknown caller, graphics overlay with alpha channel - towards the unknown stock videos & royalty-free footage00:07Receiving call from unknown caller, graphics overlay with alpha channelBrand Name Smart Phone, Device Screen, Mystery
nazi bombers attack france during world war ii. - towards the unknown stock videos & royalty-free footage01:00Nazi bombers attack France during World War II.World War II, Nazism, Armed Forces
infinity loopable galaxy space backgrounds - towards the unknown stock videos & royalty-free footage00:15infinity loopable galaxy space backgroundsOuter Space, Copy Space, Backgrounds
cu reflection of man in glass, dallas, texas, usa - towards the unknown stock videos & royalty-free footage00:12CU Reflection of man in glass, Dallas, Texas, USAMystery, Business
low angle close up slow motion shot of projections on face of woman / cedar hills, utah, united states - towards the unknown stock videos & royalty-free footage00:30Low angle close up slow motion shot of projections on face of woman / Cedar Hills, Utah, United StatesContemplation, Projection, One Person
close ups on a scientist using an old brass microscope - towards the unknown stock videos & royalty-free footage00:31Close ups on a scientist using an old brass microscopeLaboratory, Scientist, Dark
door open to light - towards the unknown stock videos & royalty-free footage00:09Door Open to lightOpening, Mystery, Open
digitally generated star field on deep galaxy - towards the unknown stock videos & royalty-free footage00:15Digitally Generated Star Field on Deep GalaxyOuter Space, Galaxy, Big Bang
black cat at black backround - towards the unknown stock videos & royalty-free footage00:08Black cat at black backroundDomestic Cat, Anger, Dark
flying away from the nebula - towards the unknown stock videos & royalty-free footage00:15Flying away from the nebulaOuter Space, Copy Space, Galaxy
mystical night scene of a lamp on a desk - towards the unknown stock videos & royalty-free footage00:30Mystical night scene of a lamp on a deskOffice, Empty, No People
journey through mind. big bang and milky way - towards the unknown stock videos & royalty-free footage00:18Journey through mind. Big Bang and Milky WayFantasy, Imagination, Paranormal
1940s wide shot old house at night during storm / trees in silhouette in foreground and lightning in background - towards the unknown stock videos & royalty-free footage00:101940s wide shot old house at night during storm / trees in silhouette in foreground and lightning in backgroundSpooky, Horror, House
search lights flashing over a foggy forest at night. - towards the unknown stock videos & royalty-free footage00:50Search lights flashing over a foggy forest at night.Forest, Dark, Spooky
man receives bribe and leaves - towards the unknown stock videos & royalty-free footage00:08Man receives bribe and leavesBribing, Giving, Only Men
clouds scud over silhouetted rocks as night falls, stars wheel over coast. - towards the unknown stock videos & royalty-free footage00:33Clouds scud over silhouetted rocks as night falls, stars wheel over coast.Mystery, Island
a woman uses her hand to create ripples in water reflected in a moonlit sky. - towards the unknown stock videos & royalty-free footage00:21A woman uses her hand to create ripples in water reflected in a moonlit sky. Hand, Water, Dark
b/w 1940 wide shot futuristic control room - towards the unknown stock videos & royalty-free footage00:07B/W 1940 wide shot futuristic control roomLaboratory, No People, Mystery