Some people will swap the heatsink in the integrated GPU version with the one intended for the Nvidia version. It has a second heat pipe, so it should be a bit more efficient. The thermal pad that is supposed to connect to the GPU must be insulated to keep it from shorting out the motherboard though.
I haven’t tried it yet. Some people say it helps, others say it doesn’t make much difference. It may be an issue of whether you get an OEM heatsink or a clone.
Check your local library. Many of them have DVDs you can borrow. The older ones may be fullscreen. Then you can rip them with Handbrake.