They've got lots of fairly healthy recipes (as well as plenty of unhealthy ones, but nobody is pretending that brownies are healthy).
The problem isn't the nutritional content, it's that these videos are of recipes that just aren't very good to start with. They've nailed the ability to shoot something that looks incredibly tasty, but if you look at the recipes themselves, they lack flavour. Nothing has enough spices added, nothing is allowed to cook long enough, etc. Complexity and culinary sophistication is thrown out the window to make food-making look enticingly, deceptively simple and quick. They're not all bad, of course. You can sometimes make a good meal out of four ingredients.
In other words: The videos are designed to be addictive to watch, not to be realistic recipes.