Is this just an FYI or are you looking for a more simplified summary of what a .mov or .mp4 is? I think you have found the best information about the two formats online! Formats can be rather confusing at first especially considering that .mp4 is a file format and a .mov is merely a container (that can have .mp4 video inside). If you take a look at some Wikipedia articles on what a container is compared to a codec, it should help you out.
Thanks for the post!