Want to clarify GPU Passthrough

Is there a way to do GPU Passthrough with one integrated GPU? It frustrates me when I want to search something on the website that has some videos playing in the background that I cannot stop and there is no need to download them but they make my CPU go up to 70-80 Celsius degrees.

No, you need to have GPU in dom0.
Maybe you can just disable video autoplay in your browser? Or use uBlock Origin or some other adblocker to block the unwanted videos?