The YouTube RPM (revenue per mille) strongly depends on the location of the audience and the topic of the video. It could be anywhere from $0.5 to $20. That 10x figure could very well be true for that YouTuber, but it's also true that other YouTubers already earn more than a penny per view.
According to [1], the downloaded video is AES-encrypted. Decryption key is stored locally in an IndexDB. I tried building a Python script using plyvel [2], a Python module for reading IndexDB/LevelDB, some time ago but IIRC, it had trouble reading the Chrome DB.
Maybe Google's dfindexeddb [3] works. I didn't try it, however.
