Yeah like you said I'm not sure if they don't fully get the platform and realize that interaction and participation is kind of expected on here, or if they know what Steemit is about and this is just kind of second tier dumping ground for them. I know a while back I was giving vidme a try and for a brief amount of time I was trying to be part of the community, I realized the site wans't really going anywhere so from then on out it was just like a content dump for me dumping 10 or 20 youtube vids on the platform at a time. I'm glad I didn't invest too mcuh time as the site is going under and is going to be closing up any day now. That said Steemit is a much better platform, has a better business model and IMHO a better future than vidme.
http://variety.com/2017/digital/news/vidme-shuts-down-video-app-1202628367/
It would be so expensive to host video content. A couple of years ago I'm glad I didn't invest more time in Vine as well. There were only a small handful of creators who sort of made it out of that and found success on other platforms.