I quoted it above, but if you go into the AppStore on the Apple TV and read the description of Infuse 5, under EXTRAS it says “Download videos from networked devices”. It’s really pretty clear as an advertised feature.
I also stated above I am fine with the AppleTV clearing up temporary data as in the disclaimer in VLC. I’ve never seen the Apple TV actually clear any yet as I have had media in there for over a year which never disappeared, but VLC won’t work for me here because it doesn’t support Dolby Digital. AirPlay usually has poorer quality then directly playing a video, thus that obviously really isn’t an option.