Cromecast (Cast a YouTube video)

When I cast a YouTube video to my Sony Android TV, it does not start to play.
I can see a stand still picture on my TV, but it does not play and im not even able to start it on my remote.

I have used the flowcard (Cast a Youtube Video) and added this URL (
What could be wrong?

If I cast to the TV from other devices like android phone or computer it works.

insted of casting a youtube video, then it would be better for me if I could start this web stream