How to enter "Full Screen View" across three monitors

I have created 3:1 photo and video files for a 48:9 format and use Quicktime for playback (three monitors 16:9, 11,520 x 2,160). Playing back the video in "Full Screen View" displays only on the center monitor. If I extend the QuickTime video across the three monitors manually, the photo / video files have to be cropped to 11,520 x 2,136 in order to compensate for the Apple Menu Bar height of 24 pixels.

Extending the Quicktime window manually is a bit of a pain in the ar... though that could be automated with an Apple Script file ... I think.

Ideally opening a 48:9 Quicktime file in "Full Screen View" would fill the full 11,520 x 2,160 resolution across all three monitors by default without displaying the Apple Menu bar.

Questions is : How?