Justin Bieber holds the record for the 'Highest Grossing Concert Film of all Time' with 99M USD gross revenue. It was showing in cinemas for 46 weeks while YTC will be opened to watch only for a limited time (4 days).
Personally, I think BTS will break the record or atleast they will generate almost the same amount of revenue as Never Say Never. Their PTD on Stage in Seoul gathered around 1.4M spectators and generated 32M USD in one day only. Granted that the average ticket price was more expensive in the PTD live viewing, atleast the YTC concert film will be available to watch for 4 days with cheaper ticket price, so more fans can go and watch the film.
All in all, let's all enjoy the film next week and have fun!