EDPuzzle also allows some video customization such as editing the length and doing voice overs.
If you make an EDPuzzle account (free) and search "Amoeba Sisters," you will find our videos! You can insert questions easily within different portions of the video. It can make our videos---and any videos---much stronger. We have an example below using one of our videos! (Note: If you actually create a class, you can make it so that the video cannot be skipped through without answering questions first. You can also take grades).