Maybe give out some ways for people to try it, at least if you're trying to promote it. With a single example, how can I be confident that it works as advertised? If you don't want to do entire free videos, consider allowing users trying a 5 minute snippet of a video of their choose so they can see what they can expect.
You could also just make some Hacker News coupons so people here could give a review/feedback if that's what you're looking for.
You could also just make some Hacker News coupons so people here could give a review/feedback if that's what you're looking for.