0:44 is the timestamp in-case the link doesn't skip to it. Found this while playing with a friend, from the runs I've seen it looks like this trick is unknown (correct me if I'm wrong) and saves a nice few seconds, the timing is quite difficult to master though. The key is to generate as much height as possible at each step of movement.

This trick is actually quite well known from some top runs I've seen. I believe not everyone uses it because as you said it is difficult to master

Ah, I've been looking at the hard mode category

Ah yeah, on hard mode the trick is a pain as if you fail it's a huge time loss