I think the topic of lasers has bested the Engineer Guy. He's usually great with explanations, demos and animations that clearly explain what he's talking about and he hits a few spot on: the ruby demo is excellent and the glow-in-the-dark ball is a nice way to link the topic to something that people are familiar with.
But the animation for retina surgery has too much detail; it feels like 30 seconds of filler where he's talking about one thing (the properties of laser light) and showing something else (some dots "fixing" a torn retina). Soon after he goes on to explain how the electrons undergo population inversion and stimulated emission which is important, but he uses the same animation on repeat for a full minute! The details of what he's talking about are lost as I'm attempting to reconcile what he's saying with what's going on in the animation.
His other 5 minute topics from his Engineer Guy book are great, but this one feels rushed and disorganized. It doesn't feel like it's too hard for him to explain, if you're just listening to him talk he does a decent job. Maybe their animation guy is on vacation?