Make a video where you benchmark Temperature/Performance of a PC compared to ambient air temperature to see if gaming in the cold improves performance.
Use room temperature 20Celsius as the benchmark then go up to 40Celsius to see what a extremely hot climate does to performance, then you can go full canadian and go down to -10/-20C using a freezer room or just doing the benchmark outside on a cold winter day.
You could also test if water cooling or air cooling perform better or worse than the counter part in different climates.