A clever friend of mine (@flyndive) has found a way that you could do this yourself if you want to get your hands dirty a bit:
Swap out your 2024 load video.
First locate the correct folder:
MS Store : …\Program Files\Limitless\Content\Packages\fs-base-videos\Videos
or : …\Program Files\Microsoft Flight Simulator 2024\Content\Packages\fs-base-videos\Videos
Steam : …\Steam\steamapps\common\Limitless\Packages\fs-base-videos\Videos
In order to be able to restore the original video, I recommend renaming the original file “PressStartVideo-4K.mp4” to something like “PressStartVideo-4K.original”.
Copy your chosen MP4 file into the folder and rename it “PressStartVideo-4K.mp4”.
To restore, simply delete or rename the file and rename the original back to “PressStartVideo-4K.mp4”.
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So in your case just find a way to get the static images you want into a slideshow saved as MP4 format and bingo!