modal windows shows gibberish when trying to output a video

modal windows shows gibberish when trying to output a video

has anyone come across this issue? I'm trying to pull a .mp4 video in the dialog box

you can see a demo of the gibberish output  here just click on the first video item.

I've also tried an .flv file and get the same results

using jqueryui/1.9.2/jquery-ui.min.js