It's a fascinating channel and very unique style of videos. Here's one of my favourites, on colors:
It's definitely a unique style; I think if you don't like it within the first 5-10 mins you won't like the channel at all.
As a fan of etymology, I'd have to agree. It went so quickly between facts that I didn't recall the previous facts and barely had time to pay attention to the current facts, before it moved on. I'm also not a fan of the layout. One much shorter video focusing on one color would've been a lot better for me, then rinse and repeat. As for the layout, I would have it show the presenter talking while in the top corner the images are shown. Something less visually distracting.
My feeling is that etymology-focused content is hard to produce. I've seen several channels or podcasts and they all fall short in a few areas.