The second video is after about another week..still lame.
She sustained a bit of a hoof crack at some point, and my farrier suggested she may have the start of white line. Although she didn't think it would make her this lame. The vet can't come out until Thursday next week. I have a call into a different farrier to come out for a second opinion - hopefully sooner rather than later.
She is very tender footed on the harder footing as well. She has been barefoot for a year and a half, but was only ridden in sand arenas since then. Now she's on a bit firmer ground in general, and a dirt arena - not sand. The farrier did not originally see any stone bruises or isolate any other sources.
Which foot do you think she's lame on? The same one in both videos? Do you think she's off in the back at all as well? Could this be caused by white line, stone bruise, tender footed, etc? I'm considering putting shoes on when the new farrier comes out to take a look.