Out of the box, Windows Mobile devices can only play WMV files. Formats like Flash video or Quicktime are not supported. Using the open source media player TCPMP and some Pocket IE tweaks, however, you can view the FLV video content available on several popular video sites like YouTube and Google Video, right on your WM5 or WM6 Pocket PC or Smartphone.
For all you Tube-aholics, this is it! You now have direct, unfettered access to Youtube, Google Video & Veoh, in all their glory. Install the CABs listed below, go directly to these websites, and click on a video to play. That’s it :)
Even better, you can also use TCPMP to watch H.264 MP4 / iPod encoded videos. With a large enough SD card, you should be able to use the same MP4 encoded videos on your Treo that you play from iTunes or on your iPod or iPhone.
dankirkpatrick comments that the device referenced in the MP4-to-Treo article at jaydryden.net is actually a PalmOS device, and not the lookalike Windows Mobile Treo 700w. TCPMP is available for Windows Mobile, though, so I’ll try and put together some instructions for this and verify that it works (it should). The encoding info on the Palm article should still apply, you just need to install TCPMP for WM, not for PalmOS.