If you are new (or even if you're not) you could do worse than check out the ChessVideos.TV classics Series to see what veteran users think are the best videos from the past. The list is ongoing and thus obviously incomplete but it points out many great yet not forgotten series such as Zibbit (FM Ingvar Johannesson) excellent Pattern Recognition Series and Katar's 1.e4 e5 Repertoire Series for Black amongst many others. Be there or be 64 square!