Theoretically, Instagram TV can grow but in practice, it is very difficult. As someone who has been interested in advertising for many years, I don't think Instagram can replace Youtube because it's hard to use and watch videos posted on TV, both for the users and content creators. To be able to watch videos in someone's account, you have to formally fight. It is also important to note that Instagram is looking at something very quickly, watching and liking. These two platforms have a different user profile.