I checked the first minute or so, it looks good enough to spend half an hour watching if I was interested in the topic. The sound is clear your articulation understandable and your voice pleasant enough to listen to. There's enough movement in the stills to make it visually attractive and you did a nice job composing the scenes.
Improvement possibilities:
•Typography: I didn't like the font you selected for the titles and I wouldn't use an outline for these titles either.
•Intro: Aside from the title font I think it would have been better with less movement in this case. You move both the title and the background in more or less the same direction and I think it might be better for example if you only moved the images not the titles. Another point is that there's a lot of empty space, especially in the first scene with his head. It might have been nice to have a big image of his face on one side of the screen and your title on the other side.
A bit like this:
example.jpg
•Keywords: you might want to use some keywords during the video as well to help convey your message. For example dates etc.
There's probably more to work on but you got to start somewhere
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