If I were an isekai protagonist, I would be transported to another world while playing a video game, this as a result of a power failure, because in my country (Venezuela) the electricity goes out a lot. Surely I would be playing, and when fighting the final boss, an electrical failure would occur, I would end up impacted by the energy and I would end up inside the video game. And in this way I would start my new adventure haha. 😅