Sly Flourish is close friends with Teos Abadía and mentioned that he's currently working through things with WotC because his video is not easily blurred due to how it was filmed.
As someone who has watched Mike's videos most of the time when he's spotlighting a product it's a PDF or a digital version, so no second camera required. You just have a separate window showing the product in question.
Hmm, I suppose one that stands out to me would be the mechanics behind long jumping in 5e.
According to the rules as written in the PHB, a player can jump a distance equal to their strength score if they use 10 feet of movement to give themselves a bit of a run up. If you play on a grid...