This is an excellent video. But it is also the first of these YouTube videos I have looked at with Google Ads embedded. It may not come up that way for you but it is a Google ads link appearing at the bottom of the clip (over the clip itself). It is pure annoyance coupled with ineffectiveness. What the ads need to be for videos is videos themselves — say, 15 seconds prior to the video’s start. Yes it will be annoying but it will also be effective and we need that for YouTube to continue as a viable operation.