You clearly got brainwashed by the false agenda with that video.
If you know the Big-O complexity algorithm, it's clear that Bitcoin is not scalable, because it follows the O(n²) curve.
Thus, Bitcoin needs to scale in the same way the internet does, with additional protocol layers like lightning networks and sidechains.

I would recommend you to learn how complexities work before making conclusions based off of fake agendas. Also watch this instead: https://youtu.be/AecPrwqjbGw