Can you cut a hole in a support wall?

Quote from the video:
Quote from Youtube video: Called jack studs the same style framing is used for door openings windows or even a simple pass-through like this now the next thing i look for is any duct work water lines or electrical in the wall.

How do you build a support beam for a load-bearing wall?

Quote from the video:
Quote from Youtube video: If you're going to put a load-bearing beam in the kitchen. You have to have a continuous load path all the way down to the foundation.