Great advice. I took out the mobo and disconnected everything from it. Just left the basic components on with one PSU (which i have 2 of the same ones). Tried it again and didn't work. Here is a video of it,
https://drive.google.com/drive/folders/1D7BsnPlTva9fi6LkuZJ7IMiP_ZyosDaZ?usp=sharing.

Would it be because the PSUs are "uncertified"? Because they should have enough power to turn on a PC with 1 RAM stick and a Celeron CPU.