Same here, YouTube crashes when attempting to play a video.
Using the Ubuntu-based ZorinOS.
It happens with and without the built-in adblocker turned on.

It seems like the following happens:

• YouTube video's page loads fine
• when clicking the play button (autoplay isn't triggered for some reason), these two requests are being sent and then it crashes right after it:

VM10:414 
 POST https://www.youtube.com/api/stats/qoe?fmt=<... OMITTED PARAMS IN MY EXAMPLE> net::ERR_BLOCKED_BY_CLIENT
VM10:414 
 POST https://www.youtube.com/api/stats/qoe?fmt=<... OMITTED PARAMS IN MY EXAMPLE> net::ERR_BLOCKED_BY_CLIENT


The blocking appears to happen even if I turn off the built-in ad blocker and have no blocker/privacy extensions installed.