It must help when the film you're promoting is so well liked, and travelling with a cast with multiple movies together behind them. (flickeringmyth.com)
I wish they didn't split books into multiple movies, since I read the book prior to the movie, I'll now forget what's in part 2. (flicks.co.nz)
If you have multiple movie libraries you want to add trailers to, repeat this process for each of them. (howtogeek.com)