fun fact: when you make something like an analysis or theory about a video game and, whether it's in written or video format, include an image or clip from the game, it costs nothing to briefly describe the image and transcribe/read out any relevant text.
instead of saying "then they say this!" and putting in a screenshot of dialogue, you could read out the dialogue (video format) or add a short image description (written format).
when you, for example, compare two images, you can describe with words the similarities, instead of merely saying "doesn't that look similar?"
some people cannot see clearly or at all, and it's only a tiny bit of extra effort to pay attention to these things.
[Image description from ALT: Meme image of a cat doing thumbs up and saying "i love accessibility". End ID.]