I share some of the same concerns. But, as I wrote in a recent post, YouTube content creators are going to start seriously poring into steemit to monetize their subscriber base, which will massively diversify the trending articles and change the appeal to general audiences to be the same as YouTube … except now you can get paid for interacting with your favorite content creators.
Check it here https://steemit.com/steemit/@shayne/youtube-will-dominate-steemit
I actually expect we'll see a Steem based UI for video soon. Something that competes directly with youtube.