Chromecast

I like to cast chess.com videos to my chromecast when I can.  The videos that are actually on chess.com, I can just cast the tab and watch them.  No problem.

Some of the videos seem to only be available on TWITCH, which is weird when I pay a subscription to THIS site.  But whatever.  Some of the chess.com videos I can cast to my chromecast from TWITCH, some of them TWITCH says are not available for chromecast.

Can chess.com please make all videos available at the actual site that I pay the subscription to so I can watch them on my chromecast (TV).  I understand using a 3rd party service inside of a wrapper, but why are some videos available here and some aren't?  

Can you show me these videos because I can't seem to find them.

http://www.twitch.tv/chess/profile