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WebVTT - Web Video Text Tracks

- CR

Format for marking up text captions for multimedia resources.

Chrome

  1. 4 - 17: Not supported
  2. 18 - 110: Supported
  3. 111: Supported
  4. 112 - 114: Supported

Edge

  1. 12 - 110: Supported
  2. 111: Supported

Safari

  1. 3.1 - 5.1: Not supported
  2. 6 - 16.3: Supported
  3. 16.4: Supported
  4. 16.5 - TP: Supported

Firefox

  1. 2 - 23: Not supported
  2. 24 - 30: Disabled by default
  3. 31 - 54: Supported
  4. 55 - 110: Supported
  5. 111: Supported
  6. 112 - 113: Supported

Opera

  1. 9 - 12.1: Not supported
  2. 15 - 94: Supported
  3. 95: Supported

IE

  1. 5.5 - 9: Not supported
  2. 10: Supported
  3. 11: Supported

Chrome for Android

  1. 111: Supported

Safari on iOS

  1. 3.2 - 6.1: Not supported
  2. 7 - 16.3: Supported
  3. 16.4: Supported
  4. 16.5: Supported

Samsung Internet

  1. 4 - 19.0: Supported
  2. 20: Supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 73: Supported

UC Browser for Android

  1. 13.4: Supported

Android Browser

  1. 2.1 - 4.3: Not supported
  2. 4.4 - 4.4.4: Supported
  3. 111: Supported

Firefox for Android

  1. 110: Supported

QQ Browser

  1. 13.1: Supported

Baidu Browser

  1. 13.18: Supported

KaiOS Browser

  1. 2.5: Supported
  2. 3: Supported

WebVTT must be used with the <track> element.

Resources:
An Introduction to WebVTT and track
MDN Web Docs - WebVTT
Getting Started With the Track Element