A nice trick I found recently :if you are downloading a movie or tv show and it is .part1.rar .part2.rar etc . you only need to download part1.rar to check the quality . once part1 is downloaded open it , click extract and in the window where you choose where to extract , check "keep broken files" or similar , at the bottom left and whilst extracting an error will pop up , close it go to the folder and you can check the sample of the film with only downloading 1 part .