I believe the OP was requesting the ability to filter out from search and/or browsing videos containing certain keywords, not filter out keywords from comments.

https://twitter.com/OdyseeTeam/status/1410012231513739270?s=19 

It is available. Enter the Odysee page on Twitter. You will find an explanation of the feature

A useful feature would be a watched video that I am interested in. I hate to see recommendations of certain types of videos that I don't like, for example pranks. I would be nice to have a blocked words feature like in twitter

Feature Request: Blocked Words