Tbh I think she’s both actually shy (the stuff she talks about in her ramblefaps isn’t a bit) and self conscious about her body. You can tell she does a lot of work posing to show herself off in the best way, she gets embarrassed about her belly, and so on. Videos give her less control.
All of this is too bad, since I expect there are at least a hundred guys who would want to pound her into a bed until the idea that she’s attractive actually gets to her.