Collateral and The Transporter share a key character.

In every scene the Zodiac appears, he's portrayed differently and by a different actor. It doesn't glorify his violence or his character. Dahmer, on the other hand, does. Dahmer would have been better if it solely focused on the victims. You don't see Zodiac flashing back in time and showing lil Zodiac as a kid cutting up roadkill.

I believe they had a download option, but they called it offline mode where you would download a file but it's an encrypted file not like an mp4 video file. I could be hazy on my memory though

They did at one point in time in the early days, but now it's just for whatever the current movie streaming thing is. Ultraviolet or whatever. You can easily rip a Blu-ray though. Takes 20 min