I call bullshit. You'd be pretty pissed if they treated your 100Mb of streaming video call the same way as a 100Mb of zipped documents in my email attachment.
You're quite right. The documents may well be something of actual importance and should be treated as a very high priority and delivered quickly regardless of the day or time. Your video is most likely idiots filing cats being hurt in what they think are funny ways, so if it takes a week to download who cares? There's much more important things to do in life.