You seem to be confounding two ideas here, people not watching with the wrong people watching. Either point does not affect your reputation. The wrong people watching still means that people are watching. The problem arrises with the last point, when people arent watching. With a very small audience as Steem and DTube have, the interests of the group will be limited and so the content nieche had to be a lot more specific and a lot more pointed. You saw with your own content that videos about steemit and blockchain do very well. Modeling and make-up do not.