I used to listen to last.fm "radio" which starting 2013 switched to just streaming one Youtube video after the next. Example <a href="http://www.last.fm/listen/artist/Deepcentral/similarartists" rel="nofollow">http://www.last.fm/listen/artist/Deepcentral/similarartists</a><p>I've let it run in some browser tab in the background and there doesn't seem to be any time limit how long it can run. Bandwidth-wise it doesn't make sense at all. Owned by CBS Interactive so it's legit.