How to play a video via drupal video ftp?
You just need a player frontend for the CCK field in question to display the video. This is actually quite easy.

You'll first need a video player frontend of some sort. I would recommend the VideoJS module ,personally, but I'm sure there are others worth looking into as well.

On your video content type, go over to Display, and change the display widget of that cck field to a video player frontend of your choice after enabling the video module.