PTMP: https://www.youtube.com/watch?v=k7VzWitgeU4
As for daisys destruction, it's a livestream of a man and 3 women torturing 3 small children with the audience giving requests, including forcing one to dig her own grave. The other 2 escaped with the help of Scully's wife but the one who dug her own grave unfortunately died. Thankfully Scully was sentenced to life in prison in 2015
I think blocks disappearing is a glitch but the others I have no idea. Creepiest thing that ever happened to me was around 2017, I recall it being around 6pm and I was playing creative and I saw a strange mob. From what I remember it had its arms stretched out like a zombie but made no sound, and had lots of dark red texture on it. At the time I was admittedly into those minecraft 3am videos and thought it could have been a curse from playing minecraft at 6pm for some reason. Looking back, that's probably why it didn't bother me at all at the time