Solved A Mystery Today
For a while, I was wondering where in the hell this image on the wiki: https://teamico.fandom.com/wiki/File:Wanderliveaction.png came from, because I thought, "there's no way in HELL there was ever a fully live-action commercial for SotC a la that Halo 3 ODST one, right? If there was, the fandom would still be talking about it now. That's gotta be just a single brief shot in a larger ad."
So earlier today, with the help of Chatgpt, I went down a rabbit hole to try and find the source of that screenshot. Long story short, it's here: https://www.youtube.com/watch?v=e11Xdx_xM5s, and my initial intuition/gut feeling was completely right- it ISN'T a fully live-action commercial, and that IS indeed only a single two-second shot, with the rest being nothing but gameplay footage. And honestly, those two seconds being the only piece of live-action SotC content ever made is for the best. We can all agree on that.