With Both Ant Video Down loader and Video Download helper installed and using both to download the same files. I've found that although the Ant Down loader seems a lot faster in downloading, the running length of the file is longer and less accurate than Video Download Helper. Also Ant Video downoloader gives a file that no subtitles will play accurately with, where as files downloaded with Video Download helper work with almost all subtitle files . Video down loader Takes longer to get a given file but is far better with Time accuracy matching perfectly what is displayed on a page and allows pretty much all subtitles to match up as intended- It works better than many other down loaders and has enough options to give it a very good level of customization.