That's a 15" X 60' whole White Fir log. Yes the belts are squealing but there is a reason for that. You don't want to over tighten you drive belts because it is hard on the PTO bearings. The Auto Feed is typically set for moderate wood not max capacity wood. You can see this as the log progresses from max capacity (15") down to maybe 12". If you plan on chipping the max then reset the Auto Feed so it turns off of sooner,. In this case maybe 2200 rmps rather than 2000. Otherwise manually operate the infeed until you get to smaller wood. I will reset the Auto Feed if I'm chipping a bunch of big wood but leave it at factory settings most the time because that is where it chips best. Having said that I'll probably set this one at 2100 rpms. So why didn't I do that in this video? This was a test and I managed it by myself so only had one hand free. It just show how incredibly useful these chippers are.