Check out Trailer 1 for ‘The Dark Tower’ which hits theaters in August. Sorry for the lack of updates as of late, I have been way too busy. But I do have more to add, including French and Russian versions of The Last Jedi trailers. Some have been wondering about Kingsman: The Golden Circle, which I do not have an official multi channel mix or individual elements. I will be working on an up-mix and have that up soon for both the green band and red band versions. Back to the featured trailer, which can be found at The Dark Tower (2017) page.
I feel like there hardly is any need for you to up-mix trailers manually anymore.
Modern receivers have various up-mixing capability’s built-in at the push of a button. Like the new Dolby Surround or DTS Neural X, which can make any Youtube trailer sound close to real multi-channel content and they even engage Atmos overhead speakers(if available).
Heck even the old Pro Logic II did a decent job of bringing Voices to the center channel and ambient effects to the rears.
I guess what I’m trying to say respectfully is that I do prefer just letting my receiver do the up-mixing vs downloading your unofficial up-mixed trailers
But of course an official surround mix is always gonna sound better than simply up-mixing stereo content, which I hope to see more of on this site.