I see YouTube got more votes, but I consider Facebook for this. YouTube is a good source, but people are there mostly for videos, while Facebook users engage in various ways, which Hive is about. And I personally compare Facebook with Hive, they are similar to me, just web 2 and web 3. I even talk about some similarities between Hive with Facebook to let people understand the way of Hive easily. It'll definitely be easiest to convert Facebook members to Hive, in my opinion.