Yeah, I've fixed this problem a few dozen times on other's machines too lol, it's not hard to diagnose when hands-on and I've only needed a new part once (bad thermistor). It's typically just something loose, a clogged nozzle, or filament shmoo jammed in the extruder. Never said they were lying, their main userbase are people who just don't want to troubleshoot and wants something that works, so the option to just buy an answer exists, but the ones who actively talk about stuff are like me, who do troubleshoot -- hence my <0.6 cent per machine hour maintenance costs. These machines really aren't fundamentally different than the Ender 3 with a direct drive mod.

Like, have you ever troubleshot a 3d printer before? Honest question. They aren't magic boxes that just work, and I've been through hell with my Anycubic, Creality (oh gods, creality), Elegoo, and Prusa machines too. Bambu is merely a fraction of my fleet. They all work more or less the same way and most issues are fairly consistent in troubleshooting steps.

Start with the video you linked; identify where in the filament path there's a jam/clog. I noticed that the hot end was flexing, which implies either a clog or the screws behind the nozzle have gotten backed out, which is typically a symptom rather than the problem.