Never work so hard that you'd be that frustrated and almost crying once fired for no reason. Corporations are no friends. They'll let you down without any reason, you're just a number. Spend your energy on them accordingly.
Once fired, go away with dignity and smile, while knowing that you had Plan B for the whole time. Many people compare relationship with company they work for with the relationship with their partner, but it's a totally different thing. Abundance mentality is crucial and always think about Plan B and build your career to be able to leave the company anytime.
Brittney posting video of herself getting fired while acting a bit desperate and frustrated won't help her in her future career (she also probably recorded them without them knowing).