Mine doesn't sound this bad but I can definitely hear a squeal when turning. When I jacked the right front wheel up, I could hear a squeak. I'm thinking steering idler arm bushings.......

Listen to the first video, the cars on youtube's subsequent play list do not exhibit the same symptoms as the first video listed (captioned; "The most terrible noise I have ever heard from a car").

https://www.youtube.com/watch?v=iqOh1q8J1zM

dry ball joint. Looked like the boot was split.

__________________
1985 300D
The rest:
1957 MGA (comatose)
1965 Falcon (sleeping)
1966 E-100 (rust test in progress)
1976 Ford 3400 D Tractor (workhorse)
1978 Mercury Zephyer (5L playtoy)
1995 Isuzu NPR D (fetcher)
1998 Subaru Legacy (Spare)
2000 Toyota Sienna (School bus)
2008 Toyota Prius (Commuter)

Took the car out this morning to run some errands, the squeaking has all but stopped. Noticed very slight squeal when turning to the right at very slow (under 10MPH) speed. Strange, because the other night when I drove it it sounded like someone was torturing a cat!!

Happens all the time. You need either lower ball joints, upper control arms or both ... Don't be lazy - problems like these don't just go away