That is probably the problem. Framerates of source and channel should match. I think Caspar 2.2 has a converter, but I did not had the time to test that myself…
Didi, Theo is trying to play the html page not a direct video stream.
It looks like youtube has updated their minimum required chrome version, meaning that the newer version in 2.2 is now too old (63 was released in december 2017)