I see the problem. Clearly it stopped extruding. There. Solved.
Oh. but why? Not sure. Is this filament brittle? Brittle filament can break in the bowden and then when the crack reaches the end of the bowden it can get stuck. If the rear fan stops spinning you can get clogs which keeps the filament from moving (is it moving? I can't tell in the video it's either not spinning at all or spinning too fast to be able to see - touch it - on the rear of the head while it is warmed up - it should start spinning as soon as the print head is at 40C or hotter).
What else - well the filament may have grinded first and then stopped extruding - although it's hard to tell which happened first. You could have dust on your filament that travels through the bowden slowly and gets stuck in the nozzle - this is obvious because when you push filament through it won't come out anymore.
Your filament may be broken, or bent, or too large for the bowden (you need to use 2.85 to 2.9mm filament - 3.0mm filament is too large - measure with micrometer). Your feeder may be defective. What happens if you push on the filament hard from the rear when this happens? Like with enough force to lift the printer off the table. About 10 pounds force.
Next time please don't make me watch a 5 minute video - tell me where the problem starts in the video or edit it down.
Probably the bowden tube isn't fully 'in' give it a shake/wiggle it, until it really goes in. To be sure just measure the distance from the top to the white coupler (below the shiny metal thing) and insert the bowden that distance, if it's less then it's hitting the alu plate before going 'fully in'.
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