here is the video:

Basically, you need to line yourself up with the line on the fence then jump on the fence and press forward at the house i go to to glitch into the air. One you are in the air, aim for the house i go towards. Once behind the other house keep spamming jump, eventually you will be behind the house and you will start to float up, from there, just float up onto that hill. On the hill, stay near the edge or you fall through the world. keep walking or sliding towards the place i get to, but at some point you need to stop sliding or you will slide right out of the glitch and end up back in the map.. Once you fall back down behind the world, just run along the side of the barriers to get back onto the map. Now, you will find yourself at the bridge but it wont open and the Walnut head doesnt spawn because of the skip. The way around this is to blow up the gas station and then use the big part that always falls in the explosion to slide glitch under the world. slide glitch towards straight ahead. The game assumes at this point you made it to the bridge and died. When you respawn and walk forward a few feet it shows a cutscene of the bridge green wall opening. Thats it. If any questions, let me know