Need access to Mp4 file types

Attempting to solve a problem within an app that I created. I was able to add flash player effect but was unable to get some of the images. So, to correct this I created some of the images via another AI software and I was even able to add subtle animation. However, I think I can take it a step further and add even better animations. It appears that you can only these supported types: jpg, jpeg, png, pdf, txt, html. I would like to see if Mp4 files can be supported on this platform so that I can animate and create my own gif images.