Hi sorry for the late reply, yes they can change the oil as the manufacturers have to have a hole in it to fill it up, Fords had the same idea but people got round it by sucking the old oil out through the filler hole and then refilling it, by now some bright spark will have found a way of changing the filters as well, as for youtube I must admit I have never looked at this problem but I will now and if I find any thing I will let you know.
Steve.