We’re back in action: uploads are processing normally, and videos are playing without errors (on both YouTube and YouTube TV). This may have also affected some profile images and community posts–all are now back to normal. Thank you, thank you, THANK YOU for all of your reports!https://twitter.com/TeamYouTube/status/1105683078419120128 …
We had issues earlier which is fixed now. Mind sharing your device info and a screenshot of the error you're seeing for us to look into it? Thanks.