It's interesting how he says videos are important. I find videos to be much slower to parse than reading features or reviews from notable people within the industry the app is part of. For example, in the case of Sketch, I didn't watch the video (didn't even know they had them until I checked today) but instead read what it's like to use the application from a couple different designers.

In the case of Dropbox (whoa, that was a long time ago), I think I just had it verbally recommended to me from techies or I just read about it on HN.

In fact, all of what I end up installing and using comes from the backs of people rather than videos. Maybes it's a generational thing.