Typically you can only block a user from commenting on your video. Have you tried marking these videos as 'Not interested'? Let us know if this helps!
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
Typically you can only block a user from commenting on your video. Have you tried marking these videos as 'Not interested'? Let us know if this helps!