Hi, my name is ***** ***** I'll be happy to help you today!
The way you would actually accomplish this is going to be actually to circumvent the Apple TV all together.
If you want video and sound you'll need a laptop with an HDMI port. Most new laptops have this
For reference here is what that port would look like (click here)
You then run an HDMI cable from the laptop to the TV
You just need the cable. Here is an example of one you could purchase (Click Here)
Thats all you need! Unfortunately you cant do this through the Apple TV wirelessly. It doesnt have that functionality (yet)
I hope this helps!
Let me know if you need anything else!
I connected the HD cable from my computer to my TV.
What do I do next to see and hear what is on my computer on my TV?