To view YouTube videos on a PC, the Adobe Flash Player plugin must be installed in the browser. In January 2010, YouTube launched an experimental version of a website that used the embedded multimedia capabilities of web browsers that support the HTML5 standard. Thus, you can watch videos without installing Adobe Flash Player or any other plugin. On YouTube, there was a page on which supported browsers could choose a trial version of HTML5. Only videos that support HTML5 MP4 video formats (from H.264 videos) or WebM (from VP8 videos) can play videos, and not all videos on the site were available.
On January 27, 2015, YouTube announced that HTML5 is the default rendering method for supported browsers. Previously, YouTube used Adobe Dynamic Streaming for Flash, , but when switching to video, HTML5 videos now use dynamic adaptive streaming over HTTP (MPEG-DASH), an HTTP-based adaptive streaming solution with bitrate, bit rate and Quality Optimization, streaming to an available network.