The video is very helpful for debugging. It shows friction in the gear train but cannot show where it is. That is something you will have to debug.
A good start is to test that every gear spins absolutely freely on its arbor and inside the frame. Test them individually, then work up to multiple gears running together in the frame.
This clock has several gears that need to be tested inside the frame. The central arbor has the most gears stacked on a single location. If the stack is too tall, then the frame can pinch on them. Gear 9 may also pass through the front frame. Another critical location is the gear behind the escapement. It is locked onto the arbor with a set screw and the arbor needs to be able to rotate in the frame or else gear 2 will not rotate easily.
The video is very helpful for debugging. It shows friction in the gear train but cannot show where it is. That is something you will have to debug.
A good start is to test that every gear spins absolutely freely on its arbor and inside the frame. Test them individually, then work up to multiple gears running together in the frame.
This clock has several gears that need to be tested inside the frame. The central arbor has the most gears stacked on a single location. If the stack is too tall, then the frame can pinch on them. Gear 9 may also pass through the front frame. Another critical location is the gear behind the escapement. It is locked onto the arbor with a set screw and the arbor needs to be able to rotate in the frame or else gear 2 will not rotate easily.