>discuss essential tools - that's kind of my issue with not mentioning Proctor Tests in this context, as they are fundamental at the pro geotech level. The top

>discuss essential tools - that's kind of my issue with not mentioning Proctor Tests in this context, as they are fundamental at the pro geotech level. The top 2 videos from the following Youtube search results about "retaining walls" do not mention Proctor Tests. https://www.youtube.com/results?search_query=retaining+wall+design https://www.youtube.com/results?search_query=retaining+wall+... And halfway down those search results is a retaining wall video presented by geotechnical engineer Andrew Lees that's longer in duration than Grady's video and he doesn't mention Proctor Test either: https://www.youtube.com/watch?v=HGuX7rmzlzA https://www.youtube.com/watch?v=HGuX7rmzlzA And after reading the wikipedia article about Proctor Tests, I think Grady made the right editorial judgement to omit that topic from a 10-minute video targeted at a general audience. Or put another way, if cf100clunk made a video about retaining walls and was constrained to 10-minutes, you would also be forced to leave out some essential topic that other geotechnical engineers would criticize. You can't please everyone when you have time constraints. EDIT add: thanks to other's links, I noticed that Grady already mentioned Proctor test in a previous June 2020 video "Why Does Road Construction Take So Long?"