There doesn’t seem to be any specific videos for your model, but for the most part you just have to take all of the screws out of the bottom and wedge something in the crack between the top and bottom to gently pry it apart. I would take a look at some other videos on similar computers to get comfortable with it first. If the case is putting up a lot of resistence once you’ve gotten a part separated, you’ll want to go back and make sure you got all of the screws out, sometimes they’ll be under the rubber feet.
There doesn’t seem to be any specific videos for your model, but for the most part you just have to take all of the screws out of the bottom and wedge something in the crack between the top and bottom to gently pry it apart. I would take a look at some other videos on similar computers to get comfortable with it first. If the case is putting up a lot of resistence once you’ve gotten a part separated, you’ll want to go back and make sure you got all of the screws out, sometimes they’ll be under the rubber feet.
😥
I promise it’s not as hard as it sounds 😂
Edit: this ifixit guide may help a bit https://www.ifixit.com/Guide/ASUS+Chromebook+C424MA-DH48F+Lower+Case+Replacement/180425