HTML5 Video Support by Codec
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
| H.264 | 4 | 12 | 35 | 9 | 25 | 3.2 |
| HEVC (H.265) | No | No * | No | 11 | No | 11 |
| AV1 | 70 | 75 | 67 | No | 57 | No |
| VP8 (WebM) | 25 | 14 | 4 | 9 | 16 | 12.1 |
| VP9 (WebM) | 29 | 14 | 28 | No | 10.6 | 14.1 |
| Ogg Theora | 3 | Yes | 3.5 | No | 10.5 | No |
For a more detailed writeup of the various codecs and their browser support, we highly suggest Mozilla's excellent documentation.
* Legacy Edge supported HEVC. Modern (Chromium) Edge does not.