I was having the same problem, I just purchased the sansa e250v2 from Best Buy and I couldnt get the video to work , It was taking up the space on the device and I could access it through my computer but when I went to the video icon on the Sansa the only one there was the demo. I called customer support and was told the problem is the sansa media converter Cs said they released these players earlier than expected and the old SMC doesnt work properly, there is a flaw in the converter that was released on the instalation CD. I completely uninstalled the sansa converter from my Pc and installed the new converter from the sandisk website and now the videos are working perfect. I have allready loaded 6 - 20 min videos all in different starting formats to make sure the converter was working with them all. This thing is great now. Too bad they didnt tell us about the software problem sooner, I spent 2 days working on this and it was a quick fix. Hope this helps you all.
I will post a link to the sansa media converter download in a few minutes.
Ok Here is the link and directions to the download, just remember to completely uninstall the Sansa media converter that came on the installation disk.
after you get to that page click on “Skip registration”
when you get to that page click on “Download another Driver”
Then go to the “select product type” drop down window and select sansa
“choose operating system” dropdown menu select your OS
Then click “find Driver”
Highlight the bubble in front of the sansa media Converter and continue
Then just click the blue download bubble and intall the converter. This should fix your video problems.
Hope this helps someone.
Have a Great Christmas