Sometimes I get teary eyed looking at videos/gameplay footage, but it’s usually because of the combination of music, aesthetic and fluidity. There was a project trailer awhile ago, that for the life of me I can’t remember the name, but it had the protagonist kind of morphing into different opponents and seemingly very fluid combat and a distinct surreal Japanese aesthetic, and I remember getting teary-eyed at that. But if it was just gameplay and nothing else, don’t think it would have the same effect.