Give the ES121 a try. I have two of them that I use heavily at work for working on laptops and other small electronics. They've been going strong for multiple years now. They have more speed and strength than the style you show in this video. They do run around $90, but if you do work with small screws it is incredibly well built. They use a planetary gearbox and thrust bearings to drive the output. I've seen several teardowns on RU-vid, and it's built very well.
I used one of those exact motor&gearbox about 6 years ago that I bought off eBay for dirt cheap, they claimed surprisingly highly torque and max axial load for it’s size, I operated it at about 80% of that spec and it barely lasted 5 uses before the gearbox started skipping. Even right out of the box half a revolution was smooth and the other half was slower and jankier. Luckily I only needed it to last a handful of uses. The reason for having the same tooth geometry throughout the gearbox is they rearrange the gears to configure the output speed/torque, you can order several different configurations that just put the gears in different orders.
Pretty reasonable gearbox, just let down by using a cheap sintered powder gear drive. Gearbox likely is available as a spare part, but is pressed together and then the screw mounting bosses are expanded to rivet the entire box together.
I had a similar one as these as well bought at the local Action, it had a different casing but similar internals. Mine failed on the motor itself and not the gearbox interestingly enough. At least it being bought locally allowed me to refund it under warranty.
From the "Gears made of cheese" in the title i expected the gears to be cheap plastic. They're probably cast aluminium or magnesium. Very brittle and weak
Gear ⚙️ looks like low quality METALURGY IT SHOULD B HI CARBON METAI SO IT SHOULD NOT GET GAMAGE DUT TO OVER TIGHT this Tiny spare Gear ⚙️ one find v difficult difficult to get in market Cost of Search in market will b more costly & its cheaper to Buy New Pcs ...
