Hello, if what you want is to do advertisement, then you are looking for exposure, check this list of top YouTube Influencers in crypto:

• Crypto Bobby - https://www.youtube.com/channel/UCt_oM56Ui0BCCgi0Yc-Wh3Q
• Doug Polk - https://www.youtube.com/channel/UCyI7FNTudkyALBh9N7hwI9Q
• Ian Balina - https://www.youtube.com/user/Diaryofamademan
• Patrik Wieland - https://www.youtube.com/channel/UCTovmBbgOEgi4iXqSH3IxjQ
• Tim Draper - https://youtube.com/channel/UC0XervL0ZmQfp4wrujySXYw

I  hope it helps, cheers!