advice from a recruiter - kind of insulted

So I have a recruiter that setup an interview for me. I've been in the industry for years, and interviewed probably 100s of candidates by now. For this video conference interview he gives me advice like, sit up straight, make sure you're wearing a nice shirt, face the camera, look at the camera (not the screen - which btw I find difficult because talking to a screen is weird), etc...

I'm used to phone screens (maybe some vid interviews), and then ftf for final interviews. Are hiring managers really making decisions based on how you talk to a video conferencing screen? Is that how far down the well we've fallen?