I think there may be a slight misunderstanding here!
While a 4K version exists, it has been noted by some reviewers, such as those on i zodiac 2007 dual audio 720p download extra quality
This content seems related to piracy (Downloading movies without rights). Make sure you own rights to download or have permission from content creator for downloading movies, Also be aware about the laws in your region. Its recomended always buy movie from Official sources. I think there may be a slight misunderstanding here