| 261 | H.261 Video |
| 263 | H.263 Video |
| 264 | H.264 Bitstream |
| 265 | HEVC/H.265 HM-10 Video |
| 3g | 3GP Video File |
| 3g2 | 3GPP2 Video File |
| 3gp | 3GP Video File |
| 3gp2 | 3GPP2 Video File |
| 3gpp | 3GP Video File |
| 3gpp2 | 3GPP2 Video File |
| 3ivx | 3ivx Video |
| 3p2 | 3GPP2 Video File |
| 3pg | 3GP Video File |
| 4xm | 4X Movie |
| aav | OccuRec Recorded Video |
| aep | AudioGraph for Netscape Animation |
| aira | Aimetis Symphony AIRA Video |
| ajp | JPEG2000 Digital Surveillance Recorder Video |
| amc | AMC Video |
| amv | AMV Encoded Video |
| amx | Adobe Motion Exchange Video |
| aqt | AQTitle Subtitle File |
| asf | Advanced Systems Format Media |
| ass | Advanced SubStation Alpha Subtitle |
| asx | Advanced Stream Redirector |
| av3 | Panasonic Arbitrator Video Data |
| avb | Avid Media Composer Binary Data |
| avc | Sony AVCHD Video |
| avchd | Sony AVCHD Video |
| avd | Movie Edit Pro Video Data |
| avf | Avermedia Recorded Video Backup |
| avi | Microsoft Video for Windows Movie |
| avif | AV1 Image File Format Data |
| avk | Avigilon Backup |
| avr | Everfocus AVR Video |
