I am fond of downloading movies, and there are times that the quality is not as expected, yung bang sa movie theater lang kinuha. I have discovered a way to preview it while downloading, the part of the movie that is already partially downloaded. This only works where the file is not archive meaning it is still in th eoriginal format, .mkv, .avi, .flv, etc...
Just go to your download folder, then copy paste the partially downloaded movie file to the desktop (or anywhere), then change the file extension to its original format, e.i. .mkv, .avi, .3gp, etc.... After that you can already play the movie and see a preview to find out its quality.
you can try the link below:
I don't know if these may help anyone, but this is what i usually do before I download a 1 gig movie and find out 6 hours later that it's crap!