Places like YC are looking for great founders instead of just good ideas. Like PG says, most startups change their idea significantly while there, which is why

Places like YC are looking for great founders instead of just good ideas. Like PG says, most startups change their idea significantly while there, which is why they even accept no-idea applications now. The video is a great place to show off your founders, your idea, and your passion for what you're doing. Having perfect English doesn't matter as much as communicating your idea and why you're a team they'd want to back.