HEMA is a Martial Arts system with structured practice for historically accurate melee combat. LARP groups are usually more fun centered. There's some overlap with people, but very little when it comes to combative application. The people in the video are a HEMA group that were applying their HEMA training to the LARP games. I like the weapons they used in the video, but a lot of LARP group use the pool noodle type weapons. We would still duel, but it has very few combative elements to it. Swinging a modified pool noodle around with any part of the noodle being a valid striking surface isn't realistic. Using metal sparring swords in HEMA with certified instructors teaching actual sword techniques in a structured classes, much better. I say this a a former LARPER and fencing teacher(non-HEMA).