Wow, this is first...
It take "special" mind to post something like this...
Multiple video files in par2 set (fine), but posted in 50MB files (fine), with par2 block set to more then 50MB (plain stupid) and on top of that recovery files are also split into 50MB files (beyond stupid)
Even rec. file with one block is more then 50MB so we got this:
whatever.vol000+01.par2.001
whatever.vol000+01.par2.002
What happens is that not a single downloaded file is recognized as block, so no joining is happening.