I would click on a @dtube link before a @dsound link but I agree. I tend to think you should post podcasts on @dsound and video files on @dtube.
Having said that.. the new Dtube is awesome. If you didn't know, they have their own Blockchain now with innovations that Steem doesn't have.. But, they are a sidechain of Steem now and anyone can create their own Dtube clone with their own native token via SteemEngine.com's Scot.Tube.
Real businesses are making USD on Steem and based on what I read @aggroed has made about $800,000 USD in the last 18 months through his @steemmonters project, Splinter lands and Steem-Engine.com.
There are other people making good money via Steem-based businesses but he is the leader by far. Members of our Steem.ph are getting started with Steem-based businesses too, particularly related to Steem Games since we have software developers and investors who can convert open sourced games using in-games points to Steem-based games using Steem-Engine tokens.
Everyone is free to join and we have a good amount of expats in our group (like me).