If you are referring to downloading illegal content sorry I can't help you, if not then happy to be of any assistance I can.
Where is the movie?
When you say download, what do you mean? Do you mean watch it on your phone or do you mean save a copy on your phone?
what format is it in?
Do you have access to a PC or Mac for conversion?
I've converted lots of files for use with many mobile devices so if you can provide some more info maybe I can help.
The gui is quite clunky, however, the options for conversion really make up for this, plus being able to select the "quality" of both audio and video mean that you can really squeeze a lot of movies onto a relatively small space. I've found a typical 1hr show (with Adverts removed) can be reduced down to just below the 100Mb mark with no visible reduction in quality (remember you are going to be viewing it on a 4" screen)
There are also lots of pre-set setting to try and simplify usage.
One trick I have found is make sure you specifiy the output directory for the converted file (right click on the SUPER application and you can set it there)
It really is a little trial and error as far as quality of output goes, however once you find a quality thats right for you, you'll probably never change the setting again. It really depend on the quality of the original file in some instances, i.e. there's no point turning the bit rate and sample rates all the way up if the original file is not of a high quality.
I'm maybe making it sound more complicated that it is, but once you have had a play with the software it is really quite simple to use.
let me know how you get on. I have pretty limited access over the next few days so apologies in advance if a little slow getting back to you.