I don't have a good playlist or show to link off-hand, but here's a wonderful video about someone finding terrible things in their old house: https://www.youtube.com/watch?v=_v33Gb2xPhU
In general you want "fixing old houses" videos that focus more on the tear down and guts and less on the "look how pretty my house looks at the end" before & afters.
In general you want "fixing old houses" videos that focus more on the tear down and guts and less on the "look how pretty my house looks at the end" before & afters.