This article assumes you are using VLC Streamer on iOS, and that you are using VLC Streamer version 4.00 or later.
The main purpose of VLC Streamer is to let you stream movies live without having to go through iTunes.
To do this,
This will stream the movie live to your iDevice without needing to copy it to the device. It uses VLC for the transcoding, so most movie formats are supported.
This will allow you to watch the movies later when you are not connected to your wifi
or, if you have already watched the movie, or have already set it converting, you can transfer from the movie list
Vlc streamer will copy the movie over wifi to your device
VLC Streamer will continue to copy the movie in the background once you exit the app.
You can also transfer movies through iTunes. Unless the movie is an mp4 type, then VLC Streamer will use the vlc player code on the app to try to play it. This won't work for every movie - but it will work for most.
To transfer movies,
This process is described in more detail in this Apple support article