subscribe would definitely be a great addition to dtube. notifications of your subscriptions new uploads even better. and a section on your home screen that shows your subscriptions new videos. once that is done, this will be a replacement for youtube. i have noticed that the thumbs up and down is tied into your upvote on steemit. I seen this on steemit and upvoted it. searched a few pople to see if they had dtube videos and when I saw this one it, it already had a thumbs up.