Non-profit advocates succeed when they make the best use of two digital tools—YouTube and email (two tutorials):

http://www.socialfish.org/2015/04/youtube-subscriber-strategies-for-nonprofits/

 https://www.salsalabs.com/why-salsa/strategic-best-practices/whitepaper-why-we-still-love-email-and-you-should-too?utm_source=fs&utm_medium=featured_resource&utm_term=email_whitepaper&utm_campaign=engagement