What editing technique is used in this video???

[Satyen Guru]

[Michelle Blioux] “I feel like it’s something simple but….”

Yes, for me, it looks a simple (but, clever) technique.

The artist takes a transparent sheet (something like an X-ray scan sheet but, with blue tint, much thinner too), wraps it around his body (in fact, it’s wrapped just front side, he pretended it such a way to look a full body wrap), finally, moves it upwards.

Same with the other shots too but, with a different prop/material (the other looks like an elastic ring with jelly kind of look).

In the final shot, the artist holds a metal ball (kind of) in his mouth and just moved into the frame from down to up upwards with camera placed upside down or flipped the image in post.

This is all with the shoot. And the trick in the post. As Mark suggested, they played with Time Effects in AE.

This is what my understanding is. And it can vary to the actual implementation.

Hope this helps you.