Hi there, I'm not someone who follows what the "digital influencers" dictate, but there are some Youtubers that I appreciate a lot, such as:

Oscar Alsing
https://www.youtube.com/channel/UCskG7xk7hK7n8wSZsblz2vQ

BritVR
https://www.youtube.com/channel/UC1Bcc--wbverxBvfxYue9Qg

Crypto Gnome
https://www.youtube.com/channel/UCJLZOWAy4TN7kt0SLyoBQ5Q
(One of my favourites, I'm on his Discord channel if you wanna join https://discordapp.com/channels/378283630360789003/389509183730614283 )

VoskCoin
https://www.youtube.com/channel/UCT44w6854K62cSiwA1aiXfw

Young And Investing
https://www.youtube.com/channel/UCczMw5XzxxVks7sNaC-QxwQ

Infinite Crypto
https://www.youtube.com/channel/UCCCxH0KFu-nDnKoCTqZHdbg

Crypto Adventure
https://www.youtube.com/channel/UC5DncRG_FoB2aXNwdzCts3g

Bitcoin for Beginners
https://www.youtube.com/channel/UCi7egjf0JDHuhznWugXq4hA

Cryptocurrency Investing
https://www.youtube.com/channel/UC1rwnT8PoaO_zUjWun6Q7lw

Crypt0
https://www.youtube.com/channel/UCdUSSt-IEUg2eq46rD7lu_g

Some of them are not big (yet), but they're real people where I can get some interesting knowledge. It took me some time to gather these people here so I hope I could help =)

Regarding their e-mail, some of them post on the description of the video, others on the "about" page on their channel.