It seems to me a good idea to incentibate users to want to add better content to their comments, because it is not necessary to make a huge speech, but in some occasions to say some opinions, to give an example or to add something to the video related to the topic, gives much more value to the video than a simple vote.

Never forget the users who participate, I am happy to be creative. And in Dtube there will be great changes in users <3