Link to affected video: https://www.youtube.com/watch?v=3TsDr9Qow94

May relate to MCPE-181869 and so MCPE-180557

The inconsistency in the video is obvious for me as there was a footage what was captured on Windows PC (see "proofs of the issue") while I and players couldn't (until the solution below is done) and having a disclaimer at the end which contradicts one of footage.

Proofs of the issue:

1. On 0:33-0:35, it was shown that the mash-up pack was running on Minecraft in Windows PC as the title bar and icons on the top right (Minimize and Resize) there were evident to me. (see images)
2. On its outro (0:51), the video claimed that the mash-up pack can only be used (thus "is only compatible") on Nintendo Switch, despite having evidence against that on the same video, and that's the mash-up pack being used on the PC as told above.

As for proof 1, I cannot get those exactly on my PC if I only consider official version of the mash-up pack, as that was not made available there until the solution below is done.

The solution is to make the mash-up pack available on multiple platforms (especially Windows (PC)) (can be via Minecraft Marketplace), thus changing the disclaimer in the outro of the trailer, and so we could enjoy the mash-up pack the way we wanted to, including the way some of the trailer had done, this would also fix MCPE-180557.