Encrypted Media Extensions
Netflix supports HTML5 video using EME with a supported web browser: Chrome, Firefox, Microsoft Edge, Internet Explorer (on Windows 8.1 or newer), or Safari (on OS X Yosemite or newer). YouTube supports the HTML5 MSE. Available players supporting MPEG-DASH using the HTML5 MSE and EME are NexPlayer, THEOplayer by OpenTelly, the bitdash MPEG-DASH player, dash.js by DASH-IF or rx-player.
Video email
Html4 markup language, in use since 2000, doesn't support multimedia elements natively. Html4 email systems typically simulate embedded video in email by having an embedded image (gif) which appears like a frame from a video. Clicking on the image causes a hyperlink to be launched in a browser window to display a video using the browser's video codec or a rich internet application like Adobe Flash. Many codecs and rich internet applications are not natively supported in browsers and require browser extensions to operate which can impede embedded video display.