There is a fairly well known early Mk3 problem which causes creaking steering, usually towards full lock. The steering column needs greasing and possibly some adjustment. The wrong type of grease was used at the factory and it dries out and needs replacing. The spacing on the column can also be adjusted. There is a TSB for this - I'll post it on Sunday night for you when I'm at home.
However, whilst it's difficult to tell from the video that sounds to me like the PAS pump is on it's way out or rack is totally worn out. Could also be a CV joint on its way out.