The Flame of Knowledge bit wasn't shown on TV - apparently after all the pomp of the 'major' awards, they cut to a commercial break and rushed through all the schools business, no speeches or anything. Don't know if it's still like that at the Children's BAFTAs cos I've never watched 'em!
Anyway, BAFTA themselves may have a recording of it, or at least pictures, in their archives, but I'm not sure if they provide copies to just normal members of the public like us!