One of my favorite TED talks is about how algorithms shape our world. It is a great video for people who have their major or are just getting interested in math. TED-Ed uses engaging videos to create customized lessons. You can tweak or completely redo any lesson featured on TED-Ed. You can also create lessons from scratch based on any video from YouTube.
You have a lesson title that you can choose, play the video while working through the lesson. You can also flip the lesson that turns your video into a customized lesson that can be assigned to students or shared more widely. You can add context, questions and follow-up suggestions to any video on TED-Ed or YouTube.
So you watch the video, then your students could take the quick quiz on the whiteboard. Then think questions that are short answer questions. Then dig-deeper where you can have essay questions or research places you can visit for your students to explore.