These are important steps as the platform is growing. While I like to write essay like stories about my life and music, there should be "plug-ins" or integrated blockchains for other kind of medias and the opportunity to use my steem to consume them. I think this will happen in future. Once steem has services for music and video, there is no limit where steemit can go.
Keep up the good work!
In my opinion, if one wants to look for business partners, Youtube, spotify etc. are not the ones steem should go for in a long term. There are lots of blockchain based projects which are trying to offer video and music services. What If steem blockchain could exchange your steem to another coin in a fly with a smart contract when you want to play a video or music on your steem site? The only thing steem and the partner would need is a small piece of code in the platform and a wallet which supports those other coins.
Is it possible? I don't know, but thee are other blockchains which are developing these kind of features.