Sorry to hear you're having this trouble — to check, does this happen across all devices and to all videos? Try clearing your cache and cookies. Also, make sure you're using an updated version of the app and a stable internet connection. Check again, then let us know how it goes!
Appreciate the screenshots – the best next step is to send a feedback report from the device experiencing the issue: https://yt.be/help/feedback . You may not get a direct response back, but we do review everything and use the details to investigate and fix issues. Thanks!