I subscribed to a TV series website and it only provides videos to download in 4k resolution and I have a Core-i7, HD 3000, 8 GB RAM laptop. VLC, Quicktime freeze playing these files. I can only watch the intros because intros are mostly black screen, I think GPU is too old to handle that much pixels to be down-scaled on a 1280*800 screen. I can play FHD fine on my laptop though, but of course my GPU isn't powerful enough so I can't convert the files to FHD.

 - Any idea how to make the down-scaling process possible?

 - Any workaround to play 4k on my laptop without freezing to death? 

 - Is really down-scaling that power hungry? Any program that can handle this on old GPU's?

Playing FHD videos, CPU usage is about %15 and playing 4K videos, CPU usage is about %300 according to Activity Monitor of Mac. And the Files are MPEG-4. MPV player plays the files at 5 FPS which means unplayable.