1. Method for enriching a first multimedia content created by a first creator, among a plurality of multimedia content creators within an online community, comprising, at a microprocessor: forming clusters, at a clustering circuit of said microprocessor, from said plurality of multimedia content creators, each cluster comprising at least two relevant creators from said plurality of multimedia content creators; assigning, at an assigning circuit of said microprocessor, to a first cluster including the first creator, a score of relevance to each relevant creator within the first cluster, said score of relevance being determined from at least one criterion of similarity between each respective relevant creator and said first creator; ranking, at a ranking circuit of said microprocessor, said relevant creators of said first cluster according to scores of relevance assigned to each relevant creator of said first cluster; selecting, at a selecting circuit of said microprocessor, among a plurality of multimedia contents from the ranked relevant creators, at least one second multimedia content related to said first multimedia content for enriching the first multimedia content; retrieving said at least one second multimedia content selected from the ranked relevant creators; and enriching, at an enriching circuit of said microprocessor, said first multimedia content based on said at least one second multimedia content.