The latest video market share figures for September from Nielsen Online's VideoCensus have been leaked to Beet.TV , and they show a huge 56 percent jump from Yahoo to 264 million videos streamed during the month. Yahoo's share still pales next to YouTube's 5.3 billion streams. But it pumped out 95 million more streams than in August, when Yahoo was trailing Fox (i.e., MySpace), MSN, and Nickelodeon, according to Nielsen Online. (Compare to comScore's Video Metrix numbers from July, which had Yahoo in the fourth spot). People still watch twenty times more videos on YouTube than on Yahoo. And just the number of streams YouTube added in September alone (592 million) was more than twice as many as Yahoo's total stream count. But the percentage of videos that Yahoo can put ads up against is much higher than YouTube's. One estimate that was thrown around at a recent online video panel that I co-moderated earlier this week was that YouTube only monetizes four percent of its videos, which would be 214 million streams. So depending on what percentage of Yahoo's videos are shown with ads, it might catch up to YouTube on revenues faster than the raw numbers would indicate.