Here is my single motor dual extruder. Now it's an open hardware project.

3D Printing
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1

Here is my single motor dual extruder.
Now it’s an open hardware project.
https://www.youmagine.com/designs/segs-single-motor-dual-extruder

2

From the video, it looks like it uses the servo motor to push the bearing against the filament. Is this correct?

3

Yes,kind of, u can use adobe acrobat reader open PDF to see it in 3d.
The 2 Springs push idler make bearing against filament. Servo makes spring switch direction.