Update
The issue appears to have been corrected, however the fix is not retroactive. Existing posts should be manually updated.
When adding topic # to a video description and using a capital char. it does not put video in that topic.
#bugreportdone
Interesting. If it puts the post in a new topic (the one with the capital character) that would mean hashtags are case sensitive in bittubers. Otherwise yeah, it's a bug.