It's been a while (four months) since I published a new video on YouTube. My latest one, published today, is a statistics video showing how to calculate a correlation coefficient - the technique used is based on Charles Spearman's rank-based test. A correlation coefficient tells us the strength (or weakness) of the relationship between two variables. If the data are normal you can use the Pearson's R, but if not - a non-parametric test such as Spearman's should be used.
I was very rusty making this video and had several re-runs to get it (hopefully) right. This will be a new topic in one of my modules (Advanced Business Data Analysis) next year. Enjoy!