I maintain a dedicated website on my Oxford University personal webpages which gives details of a series of video presentations relating to the following major textbooks which are widely used in English or in 18 other languages across the globe. These can be used, reproduced or distributed without any restrictions.
Christian Theology: An Introduction. 6th edition, 2017.
The Christian Theology Reader. 5th edition, 2017.
Theology: The Basics. 4th edition, 2016.
Theology: Basic Readings. 3rd edition, 2016.