Breeding American cockroaches in China? Why not oriental roaches? At least the oriental ones can't fly.
And while bug nutrition shows some promise, especially to non-European people who don't have a taboo on bug-eating, cockroaches seems like a weird choice. There are sanitation risks (roaches are only as clean as their habitat), they can be difficult to corral (in the video, they're crawling everywhere) and the crunchy shell can be unappealing. Why not use mealworms instead?