The opening of the video reminds me of an ad that once played on YouTube. Some guy doing a self video in front of a car in his garage and he was selling a book?
Anyway, I would suggest cutting the video a little closer to when you finish speaking so there is no long pause. We don't really need to see you finish the full exercise, you can use a special transition (fade,push,pull,etc.) to the next workout.
Put some music in the background, brand your video thumbnail, make an outro card.
Show your uploading schedule on about page and banner, do you upload daily, weekly, monthly?