Hi,
So you have a policy which bans files ending in .mp3, .mpg, .mov etc and it's working well?
To allow them to download for a specified time you could create a second policy which does not have a file restriction, and set the allowed time from 12am to 6 am. Because WinGate uses the most permissive policy it will check both policies before deciding whether to allow the file to download, if it is between the allowed times it will let it go, otherwise it will apply the first policy and deny it.
