Please for the love of god no. XD
As a witness who runs the one of the servers that HIVE lives on accross the world the absolute last thing I want people doing is using the blockchain as megaupload or zippyshare.
While it's true that the cost of memory is going down the way that the hived executable works in a lot of cases begins to get jumbled up and bottlenecks of some of its core architecure make things take longer than they should.
You start allowing super easy data uploads to HIVE then all of a sudden chain size bloat becomes a real issue, the operating costs of the entire network goes up due to the need to store this new bloat on the chain and ultimately it ends up not being so much of an asset but rather a massive expensive inconvenience to the blockchain itself.
With stuff like IPFS and whatnot already blazing trails in the whole decentralization of data and alternative hosting means I'm not sure why making something like this would honestly be the best use of your skills and resources.
Anyways, just my 2 cents. Glad to see you thinking about projects for HIVE but personally I'd dissuade you from this whole idea.. It's been visited in the past by a few folks and all times ends up running into the issue of chain bloat.
Edit: has a pretty good idea on how this could be made feasible!
RE: Storing files on Hive Blockchain: Part 1 - Planning