You can get around constant buffering with about 1Mbps and VP9 codec. You can&#x27;t ever get HD streams with no buffering at 512. If you wait at start for it to move ahead, that is a different story. The reason why you still see the spinner even on 2-3 Megs connection is that although you ISP is saying that you will get 2-3 Mbps, the connection to YouTube streaming server you are fetching content from is notat that rate. You can use the &quot;stats for nerds&quot; option in the yt player to get aprox speed you are getting