I’m pretty sure OP is not the one that made the video.

There is no mention of AI in the video at all.

TLDW: The creator made a search engine for public domain clips that is free (as in money free), since he was annoyed with stock footage providers charging money for them.

Gnome board members most likely blocking it while embezzling donations

I have the same phone as you, it runs smoothly on chromium based browser and slow on firefox. Might just be firefox not being optimized with newer css standards.