Youtube used Limelight Networks before it was acquired by google. I was in a telco by then and we were wondering why the limilight AS was getting so much traff

Youtube used Limelight Networks before it was acquired by google. I was in a telco by then and we were wondering why the limilight AS was getting so much traffic. Also, any major telco will be happy to sell you their CDN and video distribution services by now.