How can I hide television cables on a brick wall?
You can't just throw power cords through walls

Obviously, this handyman makes a couple bucks with a drywall hole saw, punching holes in walls and telling people to drop their TV cords and cables through the holes.  For signal and data cables, sure.  But for mains power cords, that's illegal.  You should fire this guy, as he's probably been doing lots of illegal and dangerous work for lots of families, and have someone competent check the work he's done. 

It doesn't work for mains power cables for two reasons. First, you can't enter or exit a wall, except at a junction box. Second, wire inside walls must be a different type, as the safety requirements are completely different.   Have a competent person run conduit or special in-wall cable such as NM from any convenient outlet to a site behind the backside of your TV.  

Also if your TV is powered by low voltage cable and a wall-wart, and total power is less than 55W, the low voltage cable can go inside the wall directly. The wall-wart cannot!

The rules for data cables are more flexible. However the brick in the wall is not random.  That's going to require either finding a route around it, or having an engineer determine whether it is safe to remove it.  Holing it large enough to pass data cables through will be effectively the same as removing it. Those bricks could be holding up your house.

(Yes, I know. It's the never-ending battle between architects, who have to make the house actually able to stand up, and interior designers who want those annoying structural features to go away.) 



Another option, after fitting electrical socket***s*** behind the TV, is to have a qualified professional reroute the TV cable (and ethernet?) to a location directly behind the TV, and then mount the cable box behind the TV also.  

I assume you are dealing with a Roku3 or Comcast style cable box where the remote is radio-based; older less sophisticated cable boxes use infrared-based remotes which require line-of-sight to the cable box.   You can detect an infrared remote by seeing how far away it'll work at night, and then try again in broad daylight with direct sun blasting the cable box.  If broad daylight reduces the range, it's infrared-based. (the sun is very loud with infrared light, which the remote has trouble shouting over).