The absolute least likely reason for that screenshot is that they literally just had a Hitler rally speech in German playing in the background for the ambience. Let's be serious here and shit on the Republicans for the shit they actually do, not for unfortunate/ironic images with no actual context.
How much more context is needed for hitler at the gathering of a political party? There's nothing unfortunate or ironic about this, this is not an accidental YouTube Autoplay, this has been deliberately chosen and played there. And it's not the first time that they've been associated with Nazi symbolics. Musk, Ingraham, the young republican leaks, the whole debate around the cpac stage?
Okay, you could somehow excuse Ingraham and the CPAC stage, and find some weird explanation for this bullshit too. But isn't it a fucking strange coincidence that so many political parties worldwide somehow manage to stay clear of Nazi symbols and imagery, and somehow there are five examples just from the top of my head for them?