Removed and broke the ball bearings while switching cog what to do and how to replace

Looks like a cup and cone bearing, nothing is broken, it’s just disassembled. Get some grease and and ‘stick’ the ball bearings back into the cup (the hub)

Here’s [video](https://youtu.be/_axwV6sfaAs?si=6jn4wIX5kNKki2_m) for reference