I think it is pretty harsh to say it won't convert anyone ever when we have testiments on these forums that it HAS converted some, however, it is true that wasn't what it was intended for. It documented the Ron Paul Revolution grass roots movement and motivations during the 2007 campaign.
If I were coming up with the best video to convert, I might go with some others mentioned to give more position substance, and which are shorter. I think For Liberty is fantastic, but BEFORE someone supports Ron getting them to watch a video that long might be tough.
The point in the other thread is that that is what people who donated thought was going out, which is more an expectation of donors thing. It is a great video, and is the one that was chosen, when people were asked to donate. For a different effort, there are many videos, but while I can send a friend some of those on youtube, I don't know if RevPac can send out Stop Dreaming, for example, by Avaroth, which uses American Pie as the background music.