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!