This isn’t going to be the answer to your request but I’m just stating how I see the challenges from my perspective after 18 months in TAC. I’m not sure if I understand your question though: would you like Tony to tell us the bpm of the PLAY video.
In the LEARN video he starts off by playing what we are about to learn in close to actual timing. Sometimes he might tell us the bpm of the version the recording artists used but you are correct he doesn’t always do this. It wouldn’t be too hard to pull up a metronome on your phone and sync it to his playing. Maybe I’ll give this a try?
While teaching he typically goes very slow to enable us to follow the fingering and chord progression.
The PLAY videos are slow most of the time (most likely below the bpm in the TAB), again this is an aid for us to learn. Learn slow to reduce mistakes and repeat often. Speed will come naturally. I don’t worry about the speed while I’m doing the challenges, except striving to play it quickly enough to make it identifiable. But this is not always possible