Ok, here's what I found. The simplevideoplayer app from the sdk is missing a line in the appMain file. It says you can uncomment any of the video links in the displayVideo () section. Only the first video is uncommented and it also includes a srt = line. In order to make any other video work, you need to add the line: srt = "". At least that made it work for me and my test mp4 would play just fine. Before figuring this out, I think I tried deleting a few lines of code but didn't seem to help.
I appreciate everyones comments while trying to figure this simple problem out. It's a bummer when you get stuck on your first attempt at playing developer.
I do notice this when I telnet in. Is this anything to be concerned with?
Type args = roAssociativeArray
Type args.url = Invalid
showSpringboardScreen