Professional handymen, electronics installers, contractors, people who do this kind of thing for a living.
I’m one of those. Anyone else think it looks a tiny bit higher on the right hand side? Lol
At least in the US and Canada, where wood frames with drywall are common, you’re going to want the screws you use to go into a stud, I suppose.
If the guy’s running cable inside the wall to reach the TV, I suppose that that’s got potential to go wrong. Like, I guess “mounting” might include stuff other than just the mounting itself.
I used to work in the AV field, and there are methods that ensure the TV ends up the wall exactly where you want it. Hitting the studs with lags is huge, but also predrilling those holes, and laying out your measurements ahead of time make it as clean and precise as possible. Fishing the data wires up and down a stud bay is actually really easy (assuming you’re not fighting insulation or a fire block), I can see power going squirrelly if the plug down low isn’t a straight shot up the wall and the installer isn’t privy to electrical work.
PSA: don’t run power extension cords inside a wall cavity! It’s a code violation and those cheesy 16awg extension cords from Home Depot will heat up in the wall because they don’t dissipate heat properly in confined spaces.
You want to put plywood blocking up, which screws into the stud, and mount to the plywood.
And yes, cable pathway, methods, etc all matter. As well as ensuring the mounting looks straight and level when neither the floor nor the ceiling are level. How the cables are managed behind the TV. Its a lengthy list actually.
