If you are navigating legacy databases or trying to optimize modern video for mobile-first web deployments, keep these core principles in mind:
This is one of its fundamental limitations. You cannot embed a playable video in a .MOBI e-book file. Therefore, a "vs" comparison here is less about which is "better" and more about recognizing that they belong in completely different categories. Use MP4 or MOV for video; use MOBI for text-based e-books.