You will probably have a hard time believing this cardboard T-Rex isn't moving its head while it appears it's constantly tracking and looking back at you.
I will show you how to set the right project size for your video clips and how to save them, so the resolution of clips doesn't change in Adobe Premiere.
Knowing how to select parts of your Gimp documents with the help of Quick Mask might be one of the first things you should learn when starting with Gimp. Let me introduce you to the basics of Quick Mask.