Update the README

Author: martamaja10

README.md

@@ -7,4 +7,8 @@ This is an extension of the [ROOT Student Course](https://github.com/root-projec
 
 In the `course/notebooks/` folder you will find 5 topical lessons. There is also an example of an Open Data analysis where you can test your understanding of the various concepts covered in the course.
 
+The in-person course based on the material in this repository was recorded on the 25th March 2026. The recording is available [here](https://videos.cern.ch/record/3025341). We encourage you to watch the video and follow along with the notebooks.
+
+## Note on ROOT version to be used
 Please note, in order to be able to run all cells of this course, we recommend using ROOT version 6.38 or higher. Such version is available if you set up the course using one of the badges above - SWAN is recommended if you have CERN computing account, otherwise you can use GitHub Code Spaces or Binder.
+