Beginner Session (5) - Basics of Git, UE4 Multi-User Editing w/ Hamachi
"Oh my god what a terribly long video" - you, probably, upon examining that 102 minute runtime.
Rest assured, there's a long chunk of useless troubleshooting in there, so don't worry. We've got you covered :)
Starred are the most important parts to watch (~40 minutes total of footage).
⭐Intro to Git - 00:00
Unreal Git Troubleshooting - 25:00
Attempting Multi-User Editing with ZeroTier - 43:49
Attempting with LogMeIn Hamachi Instead - 1:03:20
⭐Fixing Hamachi - 1:24:12
⭐Et Voila, Multi-User Editing - 1:25:47
TL;DR, video covers what git is/how to use it at a basic level. About an hour of video is wasted troubleshooting. Lessons learned? ZeroTier seems to have connection issues, LogMeIn Hamachi needs firewall rule adjustment, use provided IPv4 address of host user as static endpoint, Minecraft port works just fine.