This is deliberately allowing the voice to break between Chest and Head voice. This is Speed Bump City.
So, where we normally are careful to keep the volume and air pressure low, so that the voice won't flip into head voice, in the style of this recording, the singer adds pressure so that the voice WILL flip into head, with a noticeable yodel, on command.
It is sometimes referred to as a "glottal stroke" and is used in country and "hillbilly" vocals.
Sometimes a less pronounced version of this would be called singing with a "cry" in your voice.
You sing the song in a key where you sing in the passagio a lot, and force the voice to break whenever you want it to.
Do the opposite of what you are supposed to do to properly connect.
But don't do that now. FIRST get your connection perfected. Otherwise you may NEVER smooth out your passagio. Follow Ken's instructions on how to get smoothly through your passagio.
No deliberate speed bumps until you become a master at establishing your vocal foundation.