Sort:  

Listen, you follow the person on steemit, anything they post, such as videos will show up in your feed as a blog post. The blog post text will be the description used when uploading the video. I think it is one of the coolest crossover functions. There may be a small number of Dtube viewers, but you're post is shared to the community at large. Allowing for greater potential growth and viewership.

If you're talking about on DTube, I don't think you can follow channels from there yet. But you can follow this user on Steemit: https://steemit.com/@lukewearechange

good question

Click the small arrow beside a username and click follow.

Yeah DTUBE is just an offshoot of the Steem Blockchain, so just follow him on steemit.com or busy.org.