The text you provided looks like an automated message from a file-sharing service, media server, or automated bot used for downloading television content. This specific string typically appears in:
If you are seeing this on a website and the file isn't downloading, or if you received this in an unsolicited message: You have requested : Dark.Angel.S02E08.MP4.LEG....
: Often used to confirm a user's request for a specific file. The text you provided looks like an automated
: Automated "request" messages often expire; you may need to re-submit the request in the original app or channel. You have requested : Dark.Angel.S02E08.MP4.LEG....