You need to slow it down. The way you are working now is not smart. Watch yourself in the video. Your hands should never touch that darn shoot while its running. Nor should you stradle anything already in one that is running. Not trying to be mean ok just be safer.
Good video and it chews it up quick but please don't drop start chainsaws even when you are trying to be quick. Batter to be slower than loose an arm and walking over the tree branches is dangerous Infront of a chipper. Be safe