The built in Google Cast on my Sony 55w800c has problems with high res 60fps youtube videos. The video is way slow and out of sync with the audio. The weird thing is the Youtube AndroidTV app plays those same videos with no issues at all on the same tv.

Also, the "Cast Screen" to the Google Cast from my nexus 4 and 7 don't work at all. It is able to show my phone screen briefly.... but it is frozen and disconnects after a few seconds. All of the above youtube clips and devices cast fine to a chromecast on the same router.

Is the built in google cast inferior hardware wise to a chromecast? The fact that the videos play fine using the youtube androidtv app makes me think the Google Cast is trying to play the wrong stream or something. Hopefully this is fixable via software. Any ideas?

Edit: I uninstalled the Google cast receiver apps latest update and then reinstalled it and cleared all the app data and cache and now it plays videos smoothly. Unfortunately the "cast screen" is still not working. It freezes immediately upon connecting and disconnects after a few seconds.

Edit 2: I just noticed that casting a tab from a windows 7 chrome browser works. So the only thing that doesn't work is cast screen from my nexus 7 and nexus 4. They cast fine to a chromecast so I think the problem is something with the Google cast app. Still hoping for a software fix.