I've had many students and parents come to me saying that making videos in canvas doesn't work. They record and then when they push save nothing happens. Some say it takes hours for it to upload and finally does while others say they select save and nothing happens. It's not a specific device, but seems to happen on Chromebooks more often than others.
My students are experiencing the same issues. We have not come up with a fix as of yet. Our students are primarily on MacBook Air Laptops.