Twitter has gotten a lot more aggressive with marking media as "sensitive" and there seems to be no way anymore to turn the warning off (as of 2024-04-06). You have to click "Show" every single time you want to view a "sensitive" image or video.
A user script for monkey type user script extensions that clicks "Show" for you.
Import the script, idk.
I only tested in Firefox 124.
I tested Violentmonkey and Tampermonkey.
I guess it also works for Greasemonkey etc, but haven't tested it.