how to tell if movie works before downloading all parts?

ok, you know when you download a movie and there are sometimes like 30-40 parts to it. well, is there a way to tell if the movie works before i download all of them? like maybe download part 1 and test it out? i really dont want to download all 40 parts and find out its broken…
case in point: http://www.google.com?t=1959532&highlight=
the guy commenting says there’s an extraction error when downloading from Netload. now im downloading from RS, but i dont want to run into the same situation.
understand?
Answer #1
you can extract a single part in winrar (part1)
just select “save broken files” after selecting “extract to specified ….”
then try playing it
Answer #2
ok cool, ill try that