Can I have a video with transparent background using HTML5 video tag?

Question

We filmed a spokesperson on a green screen and have the video files ready in multiple formats.

With Flash we could use the wmode transparent within the param and em

Answer 1

While this isn't possible with the video itself, you could use a canvas to draw the frames of the video except for pixels in a color range or whatever. It would take some javascript and such of course. See Video Puzzle (apparently broken at the moment), Exploding Video, and Realtime Video -> ASCII