In Pyxel's video, he walks from the block on the left to the one on the right without jumping, or falling to the block below.

When I try, I bump into the brick above and it makes me fall below. What am I missing?

If it's what I think you're talking about you have to walk off hold left briefly, and then let go while always holding forward you can barely make it. Hope this helped :)

I still haven't been able to get this :( Do you think you could post a quick example with a rough visual guide to where the player sparkle would be when you hold/release left?

I will do my best, but it may take some time because it is extremely precise.

This is the video I made on how the trick works. Details are in the description.