They all appear to still be there to me. Pulled it up in another browser to confirm.
She has seven stretching videos on Tiktok now:
(direct url to user account was broken for a while, resulting in infinite robot check; maybe that was your problem)
As well as three more stretching videos on Youtube:
For lazy folks who don't want to follow above links, these are the new videos not posted above:
This one is age-restricted, though nothing different about it than the others. Nor is it actually new - she apparently posted it a few months ago but she only recently mentioned it on Twitter; Its very similar to one of the Tiktok videos.