I swear that screens of any kind are absolutely invisible to my dog. He just does not care one bit. Though I know he's listening, because if we're binge watching a show over a bunch of nights, he'll pick up on the closing theme of said show as a cue for someone to put him to bed in his crate (which he loves more than anything in the world).
This has been tested by our humming the current closing theme at any time of day, and then watching him run into his crate.