It really not all that hard to do but I don't have a video.
Start by removing all other parts from the crankcase assembly. Then set the assembly on its back on a drill press. Put a piece of 1/4" plywood under it to protect the metal. Then use the drill press to press down on the end of the crankshaft. You should be able to press the crankshaft right out. If its stubborn and hard to move heat the crankcase with a heat gun. If you don't have a drill press you can do this horizontally in a vise if you can get the jaws open far enough.
Hopefully the bearings will come out with the shaft. If not you will need to get a bearing puller.
You probably won't need to replace the bearings. Rotate them with your hand. If they are free and have no rough spots they are probably good