I believe it will be really cool if you are able to get Aly Osman as a guest speaker for the coming semesters. As he is a motivational speaker and he would motivate people to do better not only this, but also, he uses social media since a lot. He owns two marketing companies on the internet, that advertise for products through social media. One of which is the “Influencers”. And regarding the talk I suggest that it will be in the middle of the semester near the end to give people motivation and hope.
And I suggest this Ted Talk (https://www.youtube.com/watch?v=iIB5-AcazN4) that talk about digital literacy and why it matters. I suppose it is going to be suitable if this video is shown at the beginning of the semester as it gives people a general idea and introduction of digital literacy and the importance of it.