The pig who cried werewolf was pretty funny.

I don't believe you can if you can I sure as heck don't know how. I also think Nintendo will be really cautious in allowing you to do so. I can see a lot of consumers downloading pornographic clips. That would create an out cry among parents and lead to negative publicity and at the moment Nintendo needs to avoid negative publicity. I think Nintendo Video is good enough for now maybe offering a 3D YouTube channel would be a good next move. But downloading 3D clips freely would open the flood gates to controversy not to mention remember how the PSP was opened up to viruses when people begun downloading clips.

I think streaming is probably the best direction for Nintendo to continue going in! Also they do already allow you to download game trailers from the eShop and play them on your console. Maybe they could expand this service to shows and such enabling Nintendo to maintain control of content avoid negative publicity.

So yah I guess there actually is a way to play downloaded 3D clips. Go on the eShop and download game trailers! I hope that was helpful!