Over the last year or two there has been some interesting studies done by UL, NIST and some fire departments which are leading to some changes or redefinition in how we work on the fire ground. Not all the topics are new but there has been a refocus on some of the topics.
Below are several pages with videos to discuss these new topics. This is a works-in-progress and will likely change over the next short while. And, clearly, you must follow your jurisdictional SOPs and not a set of youtube videos.