Great list! There are many small channels that I like. Here a couple.
Decentralized Thought gives constructive criticism on cryptos: https://www.youtube.com/channel/UCMpAklXQxme_wZi3sdHdHVQ
Altcoin Picks does in depth reviews of alt coins and ico's:
https://www.youtube.com/channel/UCYrQ9ZfRz_qbIy8X-ppT6dw/