| .261 | VideoLAN | Videofiler | H.261 Encoded Video | VLC Media Player | VideoLAN |
| .263 | VideoLAN | Videofiler | H.263 Encoded Video | VLC Media Player | VideoLAN |
| .264 | Unknown Developer | Videofiler | Ripped Video Data File | Roxio Toast 15 | Roxio |
| .265 | Open Source | Videofiler | H.265 High Efficiency Video Coding Codec Encoded Video | MPlayer | The MPlayer Team |
| .26L | VideoLAN | Videofiler | Video Data | VLC Media Player | VideoLAN |
| .3G2 | Open Source | Videofiler | 3GPP2 Multimedia File | Apple QuickTime Player | Apple |
| .3GP | Various Developers | Videofiler | 3GPP Media File | VLC Media Player | VideoLAN |
| .3GPP | Various Developers | Videofiler | 3GPP Media File | VLC Media Player | VideoLAN |
| .3GPP2 | Apple | Videofiler | Multimedia Files For Wireless Networks | Apple QuickTime Player | Apple |
| .3GP_128X96 | VideoLAN | Videofiler | 3GP Video Data | VLC Media Player | VideoLAN |
| .3MM | Microsoft Corporation | Videofiler | Microsoft 3D Movie Maker Video File | 3D Movie Maker | Microsoft Corporation |
| .44 | Destiny Media Technologies | Videofiler | Clipstream 32 Kb Stream | Clipstream | Destiny Media Technologies |
| .4XM | The MPlayer Team | Videofiler | 4XM Video Format File | MPlayer | The MPlayer Team |
| .60D | General Electric Company | Videofiler | CCTV Video Clip | WaveReader | General Electric Company |
| .890 | Cavena | Videofiler | Cavena Subtitles Data | URUWorks Subtitle Workshop | URUWORKS |
| .AAF | Avid Technology | Videofiler | Advanced Authoring Format File | Adobe After Effects | Adobe Systems Incorporated |
| .ACW | Microsoft Corporation | Videofiler | Windows Accessibility Wizard File | Microsoft Windows Accessibility Wizard | Microsoft Corporation |
| .AEC | MAXON Computer | Videofiler | Cinema 4D After Effects Import Composition File | MAXON Cinema 4D | MAXON Computer |
| .AEP | Adobe Systems Incorporated | Videofiler | After Effects Project | Adobe After Effects | Adobe Systems Incorporated |
| .AET | Adobe Systems Incorporated | Videofiler | After Effects Project Template | Adobe After Effects | Adobe Systems Incorporated |
| .AETX | Adobe Systems Incorporated | Videofiler | After Effects XML Project Template | Adobe After Effects | Adobe Systems Incorporated |
| .AJP | Interscape | Videofiler | CCTV Video File | AJP Player | Interscape |
| .ALE | Avid Technology | Videofiler | Avid Log Exchange File | Microsoft Notepad | Microsoft Corporation |
| .AM | GNU Operating System | Videofiler | Automake Makefile Template | Automake | GNU Operating System |
| .AMC | Pegasys | Videofiler | AMC Video File | Apple QuickTime Player | Apple |
| .AMV | VideoLAN | Videofiler | Anime Music Video File | VLC Media Player | VideoLAN |
| .AMX | Valve | Videofiler | AMX Mod Plugin File | Half-Life | Valve |
| .ANIM | Autodesk, Inc. | Videofiler | Maya Animation File | Autodesk Maya | Autodesk, Inc. |
| .ARF | Cisco Systems | Videofiler | WebEx Advanced Recording File | Cisco WebEx Player | Cisco Systems |
| .ASF | Microsoft Corporation | Videofiler | Advanced Systems Format File | Microsoft Windows Media Player | Microsoft Corporation |
| .ASX | Microsoft Corporation | Videofiler | Microsoft ASF Redirector File | VLC Media Player | VideoLAN |
| .AVB | Avid Technology | Videofiler | Avid Bin File | Avid Media Composer | Avid Technology |
| .AVC | Kaspersky Lab | Videofiler | Kaspersky Virus Database File | Kaspersky Anti-Virus | Kaspersky Lab |
| .AVD | Magix Software GmbH | Videofiler | Movie Edit Pro Video Information File | MAGIX Movie Edit Pro | Magix Software GmbH |
| .AVF | SourceForge | Videofiler | Avermedia Recorded Video Backup | Project X | SourceForge |
| .AVH | Pioneer DJ Corporation | Videofiler | Pioneer AVH Firmware Update | Pioneer AVH | Pioneer DJ Corporation |
| .AVI | Microsoft Corporation | Videofiler | Audio Video Interleave File | Microsoft Windows Media Player | Microsoft Corporation |
| .AVM | VideoLAN | Videofiler | Anime Music Video File | VLC Media Player | VideoLAN |
| .AVP | Avid Technology | Videofiler | Avid Project File | Avid Media Composer | Avid Technology |
| .AVS | Adobe Systems Incorporated | Videofiler | Adobe Photoshop Variations File | Adobe Photoshop | Adobe Systems Incorporated |
| .AWLIVE | PYsoftware | Videofiler | Active Webcam Video File | PY Software Active Webcam | PYsoftware |
| .AXM | AXMEDIS Products and Services | Videofiler | AXMEDIS Object | AXMEDIS Editor | AXMEDIS Products and Services |
| .AXV | CSIRO | Videofiler | Annodex Video File | Macgo Mac Media Player | Macgo International |
| .BAY | Casio Computer Co., Ltd. | Videofiler | Casio RAW Image | Microsoft Windows Photos | Microsoft Corporation |
| .BBV | Huazhong University | Videofiler | PPLive Cache File | PPLive | Huazhong University |
| .BDM | Sony | Videofiler | AVHCD Information File | CyberLink PowerDVD | CyberLink |
| .BDMV | Various Developers | Videofiler | Blu-ray Disc Movie Information File | CyberLink PowerDVD | CyberLink |
| .BIK | RAD Game Tools | Videofiler | Bink Video File | Microsoft Windows Media Player | Microsoft Corporation |
| .BIX | Take-Two Interactive | Videofiler | Civilization 3 Scenario File | Civilization | Take-Two Interactive |
| .BMC | Microsoft Corporation | Videofiler | Bitmap Cache File | Microsoft Windows | Microsoft Corporation |
| .BMK | return7, LLC | Videofiler | BillMinder Backup File | return7 BillMinder | return7, LLC |
| .BNP | Sony | Videofiler | Sony Camcorder Video Data File | Sony Picture Motion Browser | Sony |
| .BOX | Unknown Developer | Videofiler | E-mail Mailbox | Mozilla Thunderbird | Mozilla |
| .BSF | Roxio | Videofiler | Blu-ray AVC Video File | CyberLink PowerDVD | CyberLink |
| .BU | Samsung Electronics | Videofiler | Samsung CCTV Video File | Samsung SmartViewer | Samsung Electronics |
| .BVR | Perspective Software | Videofiler | Blue Iris Video | Perspective Software Blue Iris | Perspective Software |
| .BYU | Brigham Young University (BYU) | Videofiler | Brigham Young University Movie File | EnSight | ANSYS, Inc. |
| .CAMREC | TechSmith | Videofiler | Camtasia Studio Screen Recording | TechSmith Camtasia Studio | TechSmith |
| .CDXL | Open Source | Videofiler | CDXL Video File | MPlayer | The MPlayer Team |
| .CED | JVCKenwood Group | Videofiler | JVC Camera Video Data File | Unknown Software | Unknown Developer |
| .CEL | Affymetrix | Videofiler | Affymetrix Probe Results File | The MathWorks MATLAB | MathWorks |
| .CIP | Cavena | Videofiler | Cavena Subtitles File | Cavena Toolbox | Cavena |
| .CLK | Corel | Videofiler | Corel R.A.V.E Project File | CorelDRAW Graphics Suite | Corel |
| .CLPI | Blu-ray Disc Association | Videofiler | Blu-ray Clip Information File | CyberLink PowerDVD | CyberLink |
| .CMMP | TechSmith | Videofiler | Camtasia MenuMaker Project | TechSmith Camtasia Studio | TechSmith |
| .CMMTPL | TechSmith | Videofiler | Camtasia MenuMaker Template | TechSmith Camtasia Studio | TechSmith |
| .CMPROJ | TechSmith | Videofiler | Camtasia Project File | TechSmith Camtasia Studio | TechSmith |
| .CMV | Corel | Videofiler | CorelMOVE Animation | CMVParser | SourceForge |
| .CPI | Sony | Videofiler | AVCHD Video Clip Information | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .CPK | CRI Middleware | Videofiler | CRI Middleware Package | CRI Packed File Maker | CRI Middleware |
| .CX3 | IDView | Videofiler | CMS Recorded Video File | IDView CMS | IDView |
| .D2V | Interscape | Videofiler | DVD2AVI File | VirtualDub | Open Source |
| .DA2 | Microsoft Corporation | Videofiler | Windows Dancer File | Windows Media Center | Microsoft Corporation |
| .DAPROJ | DivX, LLC. | Videofiler | DivX Author Project File | DivX | DivX, LLC. |
| .DAT | Unknown Developer | Videofiler | Game Data | Dragon UnPACKer | Open Source |
| .DAV | DVR365 | Videofiler | DVR365 Video File | Amcrest Smart Player | Amcrest Technologies |
| .DB2 | Samsung Electronics | Videofiler | Samsung CCTV Video Information File | Samsung SmartViewer | Samsung Electronics |
| .DCE | LYTX | Videofiler | DriveCam Video File | DriveCam Event Player | LYTX |
| .DGW | Digi-Watcher | Videofiler | Digi-Watcher Video Data | Digi-Watcher | Digi-Watcher |
| .DIF | Microsoft Corporation | Videofiler | Data Interchange Format | Microsoft Excel | Microsoft Corporation |
| .DIR | Adobe Systems Incorporated | Videofiler | Adobe Director Movie | Adobe Director | Adobe Systems Incorporated |
| .DIV | Robert Hijmans | Videofiler | DIVA-GIS Project File | DIVA-GIS | Robert Hijmans |
| .DIVX | DivX, LLC. | Videofiler | DivX-Encoded Movie File | CyberLink PowerDVD | CyberLink |
| .DLX | DIAL | Videofiler | DIALux Document | DIAL DIALux | DIAL |
| .DMB | BYOND | Videofiler | BYOND Game Executable | BYOND | BYOND |
| .DMSD | Sonic Solutions | Videofiler | Roxio MyDVD Project | Roxio Creator NXT Pro 6 | Roxio |
| .DMV | Adobe Systems Incorporated | Videofiler | Adobe Acrobat Catalog Data | Adobe Acrobat DC | Adobe Systems Incorporated |
| .DMX | Valve | Videofiler | Source Filmmaker Project File | Source Filmmaker | Valve |
| .DNC | Microsoft Corporation | Videofiler | Windows Dancer File | Windows Media Center | Microsoft Corporation |
| .DPA | Serif | Videofiler | DrawPlus Animation File | Serif DrawPlus | Serif |
| .DPD | David Pilling | Videofiler | Ovation Pro File | Ovation Pro Reader | David Pilling |
| .DPG | Open Source | Videofiler | Nintendo DS Movie File | MoonShell | Open Source |
| .DRC | Open Source | Videofiler | Open Mobile Alliance DRM Rights Object | Microsoft Notepad | Microsoft Corporation |
| .DREAM | Stardock Corporation | Videofiler | Dream Animated Wallpaper File | DreamMaker | Stardock Corporation |
| .DRT | Micrografx | Videofiler | Micrografix Windows Draw Template File | Micrografix Windows Draw | Micrografx |
| .DSL | ABBYY | Videofiler | Lingvo Dictionary Data File | ABBYY Lingvo Dictionary | ABBYY |
| .DSY | Lead System (M) Sdn. Bhd. | Videofiler | Besta Video File | Besta Electronic Dictionaries | Lead System (M) Sdn. Bhd. |
| .DTCP-IP | Microsoft Corporation | Videofiler | Microsoft Windows Movie Maker Video | Microsoft Windows Live Movie Maker | Microsoft Corporation |
| .DTV | Interscape | Videofiler | DVD2AVI Mpeg2 File | DVD2AVI | Interscape |
| .DV | Roxio | Videofiler | Digital Video File | Microsoft Windows Live Movie Maker | Microsoft Corporation |
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