If videos are one of the modern tools for personal Agile training and Scrum knowledge acquisition, podcasts can also play an important role. Audio-only material is useful in a context where the eyes are already busy, when you commute in your car for instance.
Agile approaches are used to generate quicker feedback that supports continuous improvement. Giving proper feedback is important between Scrum team members or with other project stakeholders. This is however hard and this article provides some hints on how to make it easier.