I've seen a number of cycling videos on YouTube with the nice graphical overlay. As a self proclaimed nerd/geek, I had to figure out how to do it. I made this video of a 30 min TT test I did this past weekend. The original video was 720p, but Windows Movie Maker downgraded it for some reason, and I can't reopen the project to edit it. I'm sure it was user error. If you don't like the genre of music, I apologize. Also, excuse the bumpy video on the chip seal roads. It gets smoother in sections and at the end.
And, please no comments about my suboptimal power. I know I'm nowhere in the league with the rest of you at my meager 250 watts.