does not recognise .mov files

[mikosalex]

it seems like the code does not recognise .mov files as potential files to download. everytime a .mov file is sent into a listed channel, the console prompts "No image, video, or audio found at...."

rest works perfectly fine.

[get-got]

http.DetectContentType assumes .mov is an application rather than video, so the bot ignores it.

I made a fork of this project and it accounts for that, if that's something you're needing.