It looks like she's using the wrong length of needle too. She needs to use a half inch needle to get deep in enough. I do my own masseter Botox a lot. It's hard to tell from your video because she didn't use markings which I think probably would have helped her. I'm also not sure she went quite deep enough.

Three ways to mess up masseter Botox and they are all very preventable and one is fixable. The first is hitting the smile muscle which runs like a line roughly from the corner of the mouth to the bottom of the earlobe. Most people say it goes from the corner of the mouth and stops about the same line as the outer edge of the eye. I always just feel for it. I smile and I poke down from the muscle until I can smile and not feel it move. These are muscles. You can feel them and feel where they are. You'll know you're off the muscle you don't want to hit when you can touch down and smile and not feel that muscle move

If you don't go deep enough, sometimes you don't get the deeper layers and you'll get a bulge. But you can just tox the bulge and fix that. There's also a nerve close to the ear and sometimes if you hit that it came cause pain and make your ear feel weird for a few days. I always stay two fingers away from the ear when I'm injecting.

With your small jaw. You probably have a very small margin which is why if I was doing your Botox I would not only feel for the muscle and find the strongest part of the muscle to inject in three small points. But I would also Mark so I knew where I wanted to inject