FPST,
Try downloading a videp file from here:
http://www.magnetmix.com/video.shtml.
If I'm reading you right, you don't think your limewire is capable of d/ling a video file. Click to d/l a video file from that link, and it will start d/ling in LW. If it says need more sources just right click on it and tell it to find more sources.
If it works, then at least you'll know that you can d/l videos and the advice given by LOTR's is correct.