I can tell you that compressing video takes a lot of CPU power.
1. They have the newest and fastest Macs. Powerful enough to handle Photoshopping full res banners - some of their images are upwards of 2gb. My machine is a fair bit less powerful.
2. The video is less than 3 minutes long. I did both encodes in less than 15 minutes.
3. They have the compression software, the screenshots are from that software with the video loaded into it.
Having said all that, I'm happy to do it, it's billable and it keeps me busy. (For a few minutes anyway)