Thanks for throwing this together, your specific dimensions for how many pixels images can be on steemit and elsewhere is always very handy to know beforehand. Did d.tube change their wording where they say that you have to pay to keep the file up after a given amount of time?

Your advanced tag guide was much-needed advice btw, thanks for writing that one up as well, it's logical but something that might not be apparent at first if one hasn't put as much thought into the subject as you did.