Sorry you're having trouble – have you tried reinstalling the YouTube app on your Nintendo switch? This usually fixes the issues. Let us know if that doesn't help so we can continue troubleshooting.
Sorry to hear you're still having trouble. Please send a feedback report directly from YouTube: https://yt.be/help/feedback . While every individual report may not get a direct response back, we do review everything and use the details to investigate and fix issues. Thanks!