if you want to access your shared files this thread will help:
http://talk.maemo.org/showthread.php...highlight=ntfs

if you just want to watch the videos on the N900 from your home network but not transfer them to it, you can. the N900 is DLNA certified meaning it should be be able to play them easily from your computer. if you open the default media player you should see your computer name at the bottom left of the screen in small text.