I often use Common Craft videos as an example of creating effective video lessons without having to spend a lot of money on special equipment or software. In fact, I did that in a webinar that I hosted yesterday. The video that I used as an example was Research Papers Explained by Common Craft

Research Papers Explained by Common Craft does an excellent job of explaining to students why the research papers they write in school are good practice for life in a working environment. The video does this through the example of trying to convince your boss to give you a raise. 

Common Craft videos can be previewed on their website. To use them in your school you do need a Common Craft membership.

Disclosure: I have a long-standing, in-kind relationship with Common Craft.