Can I use
?

WebM video format

- OTHER

Multimedia format designed to provide a royalty-free, high-quality open video compression format for use with HTML5 video. WebM supports the video codec VP8 and VP9.

Chrome

  1. 4 - 5: Not supported
  2. 6 - 24: Partial support
  3. 25 - 123: Supported
  4. 124: Supported
  5. 125 - 127: Supported

Edge

  1. 12 - 13: Not supported (but has polyfill available)
  2. 14 - 18: Partial support
  3. 79 - 122: Supported
  4. 123: Supported

Safari

  1. 3.1: Not supported
  2. 3.2 - 5.1: Not supported (but has polyfill available)
  3. 6 - 12: Not supported (but has polyfill available)
  4. 12.1 - 13.1: Partial support
  5. 14: Partial support
  6. 14.1 - 15.6: Partial support
  7. 16.0 - 17.3: Supported
  8. 17.4: Supported
  9. 17.5 - TP: Supported

Firefox

  1. 2 - 3.6: Not supported
  2. 4 - 27: Partial support
  3. 28 - 124: Supported
  4. 125: Supported
  5. 126 - 128: Supported

Opera

  1. 9 - 10.5: Not supported
  2. 10.6 - 15: Partial support
  3. 16 - 108: Supported
  4. 109: Supported

IE

  1. 5.5 - 8: Not supported
  2. 9 - 10: Not supported (but has polyfill available)
  3. 11: Not supported (but has polyfill available)

Chrome for Android

  1. 123: Supported

Safari on iOS

  1. 3.2 - 12.1: Not supported
  2. 12.2 - 13.7: Partial support
  3. 14 - 17.3: Partial support
  4. 17.4: Supported
  5. 17.5: Supported

Samsung Internet

  1. 4: Partial support
  2. 5 - 23: Supported
  3. 24: Supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 80: Supported

UC Browser for Android

  1. 15.5: Supported

Android Browser

  1. 2.1 - 2.2: Not supported
  2. 2.3 - 4.4.4: Partial support
  3. 123: Supported

Firefox for Android

  1. 124: Supported

QQ Browser

  1. 14.9: Supported

Baidu Browser

  1. 13.52: Supported

KaiOS Browser

  1. 2.5: Supported
  2. 3: Supported
Resources:
Wikipedia article
Official website