Correct. People come to games for the visuals, the audio, exploration, challenge, socializing, mastery, achievement, escapism, immersion, goofy fun, narrative, as a diversion, etc. Some of these things can be previewed in a preview video. No need to put a negative connotation on it.
It's weird that the video is called "DOOM GAMEPLAY" when according to you, gameplay is the least important thing about a video game and there's no way people went to the video for that.