Temperature: Bump your temperature up 10 degrees and see if it changes, if you have a thermometer check if your heating block to see if it is actually at the set temp.

Tension: here’s a good article about it

https://filament2print.com/gb/blog/141_3d-printing-extrusion-systems.html

Though looking at your video again, it looks like it’s gripping, but the wheel isn’t spinning. This is what’s leading me to something not allowing it to pass through the nozzle. If that wheel isn’t spinning, then it’s probably not an inability to grip but the stepper motor skipping because it can’t push the filament through the nozzle for some reason.

If your temps seem to be calibrated properly next step I would take is to remove your nozzle (while hot) and see if filament is able to be pushed through.

Then I would do three things next

1. check tension like the previous poster
2. do you have the right temperature for the filament you are using 2a) are you using the filament you think you are using
3. Is your nozzle clogged.