I have a short article along with the video of my talk at ALA and a video of a talk I gave at Code4Lib Midwest outlining the basics of how this kind of analysis can be done on any site.
Here they use a Summon image (with tiny illegible writing) to brand their search and a link to information and video about Summon. But do users really care? I'm not saying we should hide the search vendor branding entirely but does it make sense to feature it like this?
YouTube clips have previously allowed for captioning, but it was a system that was a little buggy and only worked from YouTube's site. That's all changed with the advent of machine-generated captions and auto-timing.