Correct her when she throws her nose. Make her give laterally, or break at the poll, or something. The first time she did it was only 13 seconds into the video. She is MUCH MUCH MUCH improved in this aspect, but still make sure you correct her when she does it.
Over-exaggerated bending at the walk is GREAT!. Keep it up.
Do not let her cut the barrel on you. She did it the first time at 57 seconds on the backside, by increasing to a trot and diving on you. Keep that inside leg on her. It was good you circled it again to make her do it right, but try to catch her before she even does it.
At 1:12 she did NOT use her butt on that first barrel. She swung it around. I would have made her circle it several times so she engaged it. Right after that, she's kinda got her nose up in the air between the 1st and 2nd barrel. Nothing wrong with throwing in a random circle between the barrels to get that nose back under control.
At 1:38 when you get to your third barrel, it's like she has a sticky gas pedal where she dives into the turn, then slows. Then dives. Then slows. Try to keep her at a consistent pace, and keep that shoulder up the whole time consistently. I honestly probably would have made her circle it even a few more times to get her to even out.
HAHA, I like how your dog likes the shady spot on the 2nd barrel.
Loping at 3:34 .... is she sore on her hind end? I'm glad you made her circle her 1st barrel several times because she had NO bend the first time, but really watch her hind end. She keeps flip-flopping her leads on the back. It's doesn't look right at all.
Loping to the right was better, but maybe something just a tish off. Wonder if she has an issue with soreness????