I have mixed feelings about things like this in much the same way I have misgivings about things like music mash-ups.
From my wholly personal and arbitrary perspective, I think it provides people with a false sense of creativity
, and has more in common with someone rearranging the place settings at a table, rather than cooking up a tasty meal.
I think if it encourages and inspires someone to begin to create their own content (from their own resources, skills and ideas) it's great. But if it becomes its own thing
, then it's just another variant of "air guitar" where somebody is pretending to be artistic when they're really not going much beyond being clever or entertaining.
But that's probably just me.