I don't have much to lose yet, with all the success on HN I have only 2 feedburner subscriptions so far. But your advice is good, I will definitely give it a thought.
I gave your site a plug on Twitter. Not the sort of thing I would return to (I don't really like video on the web), but I like the idea and effort. Would definitely keep an eye on it if there were transcripts but, to be honest, it's not a service I'd pay for. (Same goes for Mixergy though I barely remember to skim those transcripts and usually just read some bullets/highlights if available.)
You could look at paid spots though, especially if you had more than one interview a week. A tech company might pay your hosting bill for the month if allowed to feature one of their developers?
Another thing might be trying to complement a HR service and make yourself valuable there. Can't think of anything off the top of my head, but a bit of brainstorming might uncover something.
Thanks for the plug on twitter.
I definitely don't mean viewers to pay me for watching interviews, that's absurd. Also, my current hosting bill is $20 a month and I see no reason for me to ask anyone to pay it. What I'm interested in is growing the project to the level when I will be able to make something even more interesting out of it. That requires some established audience.