We have recently built https://www.co-train.space/ https://www.co-train.space/ to let people exercise online with Youtube video. See discussion here: https://n

We have recently built https://www.co-train.space/ https://www.co-train.space/ to let people exercise online with Youtube video. See discussion here: https://news.ycombinator.com/item?id=22890595 https://news.ycombinator.com/item?id=22890595