Why use Google's Meta.A.I., they now own your pictures. You can directly load 14 seconds of MP4 video through the media button, and the video playback is much smoother.
We will be making this requirement anyways, we're writing it up to make the steps obvious, though it's easier than loading a YouTube video. Try it out, one less step, it all happens on our server and nobody else gets to use your excellent creations without crediting you.