To address your second question-- I talked about it a bit in class-- I use Facebook a lot to express my personal opinions on social issues and I really like to reblog pertinent videos/articles. I follow news sources like BBC America, and special interest pages like WeAreMitu (their description is: WeAreMitu is a home away from home for Latinos in the U.S. We are young, edgy, smart, loud, funny, relevant, proud, united..we are unapologetically Latino).
I have to say that I thought about a video I once shared about the Flint Water Crisis. I remember thinking... "I shared it, but??" I didn't feel at all impactful from it. I was shocked, obviously, but I didn't do anything else.. not even research it further. So now that I can reflect on all of our conversations, I understand digital social activism as a supplement to a physical movement. I consider now that reblogging that video created more awareness and that I showed support to my friends who are actually engaged in the movement as a collective whole.
Finally, I think pairing videos with STEP TWO instructions of reblogging (i.e. meeting up at a certain place for a rally) is even more beneficial and can enhance digital activism.