There is a maze of different understandings of Revelation which makes to it all rather complicated and off-putting to begin with.
Mike Winger is a very good biblical scholar who teaches with honesty and integrity. Here he presents a teaching on the various forms of understanding available.
The video is thorough and unbiased and it lasts one hour forty minutes so he is not cutting corners here. However, he does not waste time with unnecessary verbiage, he keeps to the point and he has a relaxed mode that is pleasant to follow.
I would thoroughly recommend this video as being one of the best I have seen on this subject.
Clicking here will take you to this video.