Thousands of comments shows that the users that are joining Hive are actually stickin around and contributing. It starts out slow then as those new users spread the word it picks up pretty quick.
If you post videos though, try to always reply to the people who take the time to comment on your work. Some Creators like to post every day, just churning them out. In my opinion that is not the best way... better if you just post once or twice per week, but always reply to the users' comments that you get and get the conversations going.