@rossdcurrie you make a couple great points I really really agree with.
DTube to me isn't really worth posting too. They take 25% of my curation reward and if you read the details your videos only stay up for 5 years and after that you would have to pay them to host it is my understanding. Now granted 5 years is a long time but Youtube will host my video for free forever, and they aren't taking a cut. Also as a youtube creator I can drive more views to my Youtube videos where I'm getting paid as well from there. The only benefit I can see to Dtube is you get in front of an audience on DTube you may not be exposed to on Steemit since DTube watchers are probably more into video content and steemit watchers are more into written content.
I think you also make a great point about all these platforms posting to Steemit. I remember last summer when I first started using Steepshot I was very surprised when I saw the content show up on my Steemit blog. Being new I kind of assumed they were two seperate platforms. I've kind of gotten used to it and it doesn't bother me but I can see the benefit to seperating the platforms ie if I blog once a day but I also post 5 photos a day my blog kind of starts getting bogged down with photos. I think its only natural its easier to post more pics than it is writing so photos from Steepshot kind of wind up dominating your blog stream.