Here in our first episode on our 2-parter on Black Holes, we explain what a black hole is in theory and what it probably actually is in practice. We dive into why it is still hard for us to really know what the true nature of black holes are and we discuss the different kinds of black holes.References:

https://forums.space.com/threads/how-to-calculate-a-black-hole%E2%80%99s-event-horizon.27467/
https://astronomy.stackexchange.com/questions/49957/do-schwarzschild-black-holes-exist-in-reality
https://www.reedbeta.com/blog/emc2-is-only-half-the-story/
https://medium.com/predict/the-black-hole-made-of-light-5494e972abab
https://imagine.gsfc.nasa.gov/educators/lifecycles/LC_main3.html
https://iopscience.iop.org/article/10.3847/2041-8213/ab2646
https://www.wired.com/story/where-do-supermassive-black-holes-come-from/