P38A You tube Front Diff Knackered

Guys, been looking at a few threads here over the last few days and it would seem that someone else has fallen fowl of this clip. I checked this clip after I had a noise appear from the front which turned out to be the UJ on the front prop but this clip had me scratching my head as it states a knackered front diff but am I the only 1 thinking this is bull?? surely a knackered diff would not "chirp " like this but would be a grumble all the time ??

What clip?!

sorry just search you tube for range rover with knackered front diff. shows guy driving his P38 along the road with what he presumes to me a knackered diff, for some reason I cannot import the clip here.