Sometimes, watching a video can present information in a way that provides understanding beyond simple text and pictures.
At other times, a video provides a useful overview of a topic, while the text and images in the course give a deeper and more complete understanding of the demonstrated procedure.
![ECG_principle_slow. By Kalumet (selbst erstellt = Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/)], via Wikimedia Commons](https://brooksidepress.org/ecg/wp-content/uploads/2015/11/ECG_principle_slow.gif "ECG_principle_slow - Cardiac Rhythm Interpretation")
ECG_principle_slow. By Kalumet (selbst erstellt = Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/)], via Wikimedia Commons
Real-time_MRI_-_Thorax. By Biomedizinische NMR Forschungs GmbH (http://www.biomednmr.mpg.de) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons