After a hard time plowing and getting stuck finally got truck back up driveway, I have a long steep driveway. Thought it was out of gas because on the way up it was cutting power like it was going to die. Parked it. Put 3 gallons gas in and charged batter to 100%. Starts up, REVS REAL HIGH then slowly drops and dies. I do have a known short in my plow but it has never done this before. Also the wire from my positive post of battery to alternator is hanging on by a thread and looks jacked up. When I try to start I feel like I smell more gas than usual. What could this be? I have a link to the starting process 20 sec video --->

https://youtube.com/shorts/QHT09DkYnIU?feature=share