I have, months ago, successfully downloaded videos from Twitch and another site. The 720p or so quality of the videos that are available is great. I don't mind the barcode on some of them all that much. One of the videos was downloaded in Webm format which I had never used before, it played great, overall equal quality to the site. For videos over an hour, the physical memory usage for the browser will go way up. I suspect this is java script that becomes unresponsive. Thank you for reading.