Worm Cocoons and Baby Worm Hatching
https://www.youtube.com/watch?v=EwW4FzRQpgg
Composting Worms in 80 Gallon Compost Bin
https://www.youtube.com/watch?v=3cGq3obIv7M
Worm Casting Harvest Over 70 Pounds! (13+ Gallons)
https://www.youtube.com/watch?v=sQT3B8Of4WI This is an excellent use of a compost tumbler- you'll probably get better results using it as a worm bin!