Perhaps some of what I say is obvious, but just in case: one way to boost user engagement to RUclips videos (like this) is achieved by embedding them in web-pages that rank highly in search indices (e.g. Google). "Sentiment Analysis" and "Search Engine Optimisation" is what you want to search for. For managing user engagement, and search rank indices respectively. Here's a nice case study on how Stack Overflow recently redesigned their "Top Navigation", for which they powered decisions using quantitative and qualitative methods to measure user engagement: stackoverflow.blog/2017/02/Why-Stack-Overflow-Redesigned-the-Top-Navigation/
Perhaps some of what I say is obvious, but just in case: one way to boost user engagement to RUclips videos (like this) is achieved by embedding them in web-pages that rank highly in search indices (e.g. Google). "Sentiment Analysis" and "Search Engine Optimisation" is what you want to search for. For managing user engagement, and search rank indices respectively. Here's a nice case study on how Stack Overflow recently redesigned their "Top Navigation", for which they powered decisions using quantitative and qualitative methods to measure user engagement: stackoverflow.blog/2017/02/Why-Stack-Overflow-Redesigned-the-Top-Navigation/