One meaning for clip is a short part of a film or television program (Longman, retrieved 4/21/2016). But, clipper does not refer to a meaning close to film clips. Can I use, however, clipper to refer to someone whose hobby is making, watching and distributing clips, for example on Youtube? If no, what would be the alternatives?
That is not an established meaning of the word "clipper". If you used the word to mean that, no one but you would know what you are talking about.
The word "clipper" is commonly understood to refer to certain cutting tools, usually those with two connected blades, like scissors or a "hedge clipper" or "nail clippers". By extension it is used for electrical cutting devices that have largely replaced scissors for cutting hair, "hair clipper". It also can mean a type of fast sailing ship.
I don't know of any widely-recognized word that expresses the idea you are looking for.
You could, of course, try to create this new meaning of the word and get others to use it. Inventing new words and getting others to use them is hard. You'd have an advantage here because there is no existing word you'd be replacing.
If you are looking for a word to use in one book or article, it's much easier. At the beginning you can say, "In this book I will use the word 'clipper' to mean ..." Then the reader knows what you're talking about and it doesn't matter that it's not an accepted word.