Netflix supports HTML5 video using EME with a supported browser: Google Chrome (on Windows, OS X and Linux), Internet Explorer (on Windows 8.1 or newer), or Safari (on OS X Yosemite or newer).
The HTML5 EME is based on the HTML5 Media Source Extensions, which enable adaptive bitrate streaming in HTML5 using e.g. MPEG-DASH with MPEG-CENC (Common Encryption) protected content. Also YouTube is supporting the HTML5 MSE. Available players supporting MPEG-DASH using the HTML5 MSE and EME are the bitdash MPEG-DASH player or dash.js by DASH-IF.