Legal Question in Employment Law in Pennsylvania

If the employer is using the training videos inside the company and is not selling them to third parties, that is probably OK. The law does not assume that you have the same "expectation of privacy at the workplace." If the employer is actually selling the videos to third parties without your consent, that is probably a "missapropriation of commercial likeness." More details would be needed to fully evaluate your question and provide you with a firmer answer.