This is all very strange. When I copied my video folder from the PC to the root directory of N900, the video files don't show up in Media Player list. To make them available, I have to copy them to .video folder on the N900.

I then checked my tracker.cfg as naabi suggested and I found that there is a NoWatchDirectory entry and it includes a directory called $HOME/MyDocs/tmp.

And it just so happens that the folder that I copied over from my PC was called tmp and it was sitting on the root directory!!

What coincidence!

Anyway, I've renamed the tmp directory so now all my videos appear in the Media Player list.

So, if you want to hide your videos then you simply have to either add an entry like naabi suggested or change ur video folder to tmp.