I thought the same when I first used GT6 after the 1.09 update. The Red Bull Standards are now terrible - the feedback seems almost random - I'm now 5-10 seconds a lap slower with them!
Try different cars and tracks. I increased the FFB setting from 5 to 6 and have my sensitivity set to 2. The game seems ok with Cobra, Corvette, Lotus Elan and WSR F3 which I raced online today at Trial Mountain. I think there is a problem with certain cars and certain tracks - bumpy tracks and cars with a lot of downforce. Perhaps you were driving one handed to shoot the video - I always drive two handed as it gives finer control.
Good luck and I hope the problem is limited to just a few cars or tracks.