Yesterday morning I logged into my YouTube studio dashboard and saw that my little channel of screencast videos now has 40,000 subscribers! My videos aren't anything fancy. I just write some bullet points on a notepad then record using Screencast-o-matic. I do some light editing (blurring, trimming, and occasionally adding text overlays) and then hit publish. I've never had a video go "viral" nor do I try to make them go viral. The point is just to make clear and concise videos that help teachers.