Ever wonder what types of videos are consistently the most popular on YouTube (and what percent are carrying ads)?

Methodology

We tracked YouTube's top 100 daily most-viewed videos by content type and whether an ad was served over a 30 day time period, comparing results to six months ago.

Results

Overall, YouTube is doing fairly well: although only 41.93% of the most popular videos have ads, that number is growing by 0.83% per month and both unofficial TV/movie clips and user-generated content are down.

Pertinent to agencies, advertisements increased by 0.42% in their share of YouTube's top 100.