Thanks for reaching out. Try uninstalling the app updates, restarting your device and reinstalling them? Here's how: Open the Settings app > Tap Apps > Tap the YouTube app > Tap ⋮ > Tap Uninstall Updates. Let us know if that helps.
Thanks for the info. Could you file a feedback report with these steps: https://goo.gl/1ckkO5 ? While every individual report may not get a direct response, we do review everything and use the details to investigate and fix issues.