Thanks for your patience, the 500 error is now fixed!https://twitter.com/TeamYouTube/status/980889488531521536 …
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Thanks for the report. Please flag those videos. Also, here is how you can improve your recommendation: tap the 3 dot menu > Not interested > Tell us why > I'm not interested in this channel. Doing this influences how YouTube suggests videos to you in the future.