I think I will announce adds and removes here.

Today I added Blockchain Demystified
https://www.youtube.com/watch?v=LdOcXXB48fI&index=41&t=331s&list=PL05dEp7goGNiKWYdiE4nurEPFMmF9XpzF


to http://www.BitcoinExplainers.com