I can't say I understand what they're saying, but it appears to be a sort of short ("short", 21 minutes) about producing a song, over the course of the day, with making the instrumental first and then using Vocaloid Beta for the vocals. In the latter half, there are some scenes showing different things you can edit in Beta Studio, and I imagine he's talking about the parameters and how intuitive it is to use. Pretty neat!
(Sidenote I tried the auto translate CC JP->ENG after typing this out, and it seems to work decently. I don't have time to go back and rewatch, but if you're interested in a producer's opinions and explanations, it could be worth a watch)