Video element

- LS

Method of playing videos on webpages (without requiring a plug-in). Includes support for the following media properties: currentSrc, currentTime, paused, playbackRate, buffered, duration, played, seekable, ended, autoplay, loop, controls, volume & muted

IE

  1. 5.5 - 8
  2. 9 - 10
  3. 11

Edge

  1. 12 - 81
  2. 83

Firefox

  1. 2 - 3
  2. 3.5 - 19
  3. 20 - 77
  4. 78
  5. 79 - 80

Chrome

  1. 4 - 81
  2. 83
  3. 84 - 86

Safari

  1. 3.1 - 3.2
  2. 4 - 10.1
  3. 11 - 13
  4. 13.1
  5. 14 - TP

Opera

  1. 9 - 10.1
  2. 10.5 - 68
  3. 69

iOS Safari

  1. 3.2 - 10.3
  2. 11 - 13.3
  3. 13.4
  4. 14.0

Opera Mini

  1. all

Android Browser

  1. 2.1 - 2.2
  2. 2.3 - 4.4.4
  3. 81

Blackberry Browser

  1. 7
  2. 10

Opera Mobile

  1. 10
  2. 11 - 12.1
  3. 46

Chrome for Android

  1. 81

Firefox for Android

  1. 68

IE Mobile

  1. 10
  2. 11

UC Browser for Android

  1. 12.12

Samsung Internet

  1. 4 - 11.2
  2. 12.0

QQ Browser

  1. 10.4

Baidu Browser

  1. 7.12

KaiOS Browser

  1. 2.5

Different browsers have support for different video formats, see sub-features for details.

Resources:
Video for Everybody
Video on the Web - includes info on Android support
Detailed article on video/audio elements
has.js test
WebM format information
WebPlatform Docs
Sub-features:
WebM video format
MPEG-4/H.264 video format
Ogg/Theora video format
WebVTT - Web Video Text Tracks
HEVC/H.265 video format