When I download stuff, I usually look at the file size and what it ends in.
if the file ends in .wmv, .avi, .mpeg .mpg .mov , .ram then its all good..
and the file size should be pretty reasonable like possibly 100MB if its uncompressed video.
I think its fine, I dont see why anyone would make JJFP videos a virus. So I say, go head and download!