TL;DW; he bypasses the whole 2500 dollar software thing by using common sense that the caliper only has two wires in it so you just need to feed a positive and negative power line to it from a low voltage power source and it will extend or retract the electric caliper as needed.

Yeah, i watched the video and the dude just yap and yap and yap non-stop, and the actual content is only at the front of it.

That trick works with all EPB, you can also take off the motor and turn the mechanism yourself, that's how all backyard mechanic does it for every car with EPB without buying the tools meant for workshop. There's nothing special to it. Dude could've save a lot by send it to dealership instead.

Edit: also all car with EPB works that way, this is not uniquely hyundai, you need a scan tool to retract that piston, or you do it the way backyard mechanic do. There's like so much unnecessary drama here.

You must not be american. It is literally not an option here.

They already do.

Why is the parking brake involved with the computer at all....

It is and it isn't. To use the onboard control to actuate the parking brake, yes, you have to use the paywalled software. But it's a simple motor. Positive and negative. If you disconnect the connector at the parking brake and use fused jumper leads to a 12v battery, you can cause the actuator to go forward or backwards. Make sure the parking brake isn't applied before doing anything, disconnect the cars battery, disconnect the p brake connector, jump the terminals once you figure out which polarity causes the retraction. Manually compress the caliper piston, replace the pads (and hopefully the rotors too). Pump the brake pedal as you would normally once everything is replaced, reconnect everything, and you're good to go. in my experience this doesn't work on ford but there's a service procedure that doesn't use a scanner to force the park brake into service mode. There's always a way around dumb stuff like this