У вашего броузера проблема в совместимости с HTML5
If you have the 400 error messing with you in Google Chrome it is not your fault and you are not alone with this is happening.
You see this happens because of corrupt cookies that do not expire automatically as they should, stay cached in the browser.
Because the corrupted cookies stay around the browser rejects saving any new ones thus creating this error.
So with this video you should be a nice easy road-map to
fix this issue by removing the cookies of the specific web-page that
is giving this error.
Hopefully his has helped you out and have an amazing day!
Also a side tip if you use incognito mode you can watch YouTube in a pinch.
kragtight