Here's my feedback and opinion on Martin's QTV for what it's worth:
I like the new theme tune, although I do miss the old Chinese one, which I would sing along to, " ding ding ding ding...".
I got completely lost within about 2 minutes of watching this. I understand that the pace had picked up considerably, but for me it was too much in too little time, and I couldn't digest it all that well. I subscribed to Martin's channel because I enjoy his patient explanations, and anecdotes, and his learning journey. With QTV, it's feels like it doesn't come from the heart, like he's reading a script, and someone is standing over him with a stopwatch.
Sorry Martin, but QTV doesn't do it for me. I'm sure a lot of work has gone into making the QTV video, but it doesn't meet with excellence. I would much prefer something like this to be covered in one of your T4Ds.