For a year BBC World was the laggard. Al Jazeera took off very early in 2007. France 24 picked up more slowly, but it increased clips at YouTube faster than BBC. Then in a single month — roughly the last half of April and the first half of May — BBC shot up to 200+ clips. The question is: would that level of activity hold? Would they fall back to the earlier pattern?
Five days later and this is an update. May 26 through May 30 BBC World posted 25, 21, 35, 54, and 35 video clips. That is an average of 34 clips a day, which is certainly not falling back to the previous level of activity. If they keep up this level of activity they will be putting more than a thousand clips on YouTube each a month.
In March 2007 BBC World and YouTube announced that YouTube would carry BBC video clips. Google could find a number of stories about the inauguration of the BBC World channel.
In April of 2008 BBC did some name changing and also changed the format/aesthetics of their World news. While there were a number of stories about the change in name and design searching did not produce any stories reporting that the activity level was going to shoot up.
Somebody must have decided to increase the video on YouTube. But we do not know what the self-understanding was in making that jump. We just know BBC now has a much greater presence on YouTube than it had.