If you read my post above, the Youtube app for streaming devices such as AppleTV is very poor quality. Video is almost always low resolution and audio is always compressed. You will ALWAYS get better audio from youtube on a computer web browser.
But if you want to youtube with AppleTV, go for it.
I'm still a little confused. I did read your post. If I place the laptop on my rack and hook usb from it to the DAC I'll have better SQ, understood. No AppleTv involved. With this setup the laptop is not on my lap for viewing.
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