I hate to be all... "like this", but... umm... vids, guys. Otherwise... I'm sorry to have to put my foot down about the whole myth of "Many vs. one = in favor of the one" thing, but... yeah.
I will try to do the same, although I rarely have time in my class environments (people are paying to have students taught by me) to just break out cameras, put them into people's hands and ask them to film. They also may or many not want their children filmed & "shown online for SW folks", lol.

That being said, I can tell you that I've done COUNTLESS "games" of:
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OPEN SPACE. All students against me. Usually 6-12 total bodies comin' after me, sometimes more. Not small space, not huge. It's just for fun, because I simply get hit DOZENS OF TIMES. We go by "lives", lol. You have so many lives (like a video game) and then... yer simply dead. In this case, I have to have like 6-12 lives (or more!), and they each get 2, maybe 3. It RARELY ends well for me, lol.

Even if they are all somewhat younger, inexperienced students. Remember: these are KIDS. I'm an adult.
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LINE THAT CAN'T BE CROSSED... except by one foot (usually a lunge). So, in this case, the line is the "invisible" barrier, and no one can cross it with two feet (even me). If you cross it, you lose a life. Still usually 6-12 total bodies comin' after me. Now in THIS iteration of the game, yes, I fare MUCH MUCH better!

Even so, if the fencers even have an "intermediate / advanced" level... it's very very VERY VEEERRRRYY tough to pull off. At least in this case--yup, I have a chance to win, but their chances are far greater. I can win if everyone acts somewhat individually. I will quickly lose if people generally "attack at the same times" on certain moments, and use really smart timing to catch me while I'm "busy" with another action/fencer.
There are other games, but whatever you get the idea. In the open space one... I'm sorry, but YOU'RE SIMPLY DEAD. Unless you can show me some vids (where you haven't asked your pals to go easy, or... you don't have a bunch of knuckleheads who don't know what they're doing and are scared to strike) where you magically fend off a dozen attackers without being hit, or... you know, whatever your rule-set... then as a master on this forum, I have to call BS. I don't need nor want young people getting involved in martial arts to have ILLUSIONS of how things roll in REAL-TIME combat/sparring.
Sure, in the movies... you can do whatever YOU LIKE!!!

The more fun, the better! Definitely DEFINITELY do the "Cyrano vs. 10 men" thing!! PLEASE!!! It's friggin' awesome!
But don't be a chowder-boots and expect me to believe that one human being can somehow outdo 5-10 human beings of somewhat equal martial skill. That's ridiculous, and it's (sadly) not logical.
On the note of terrain + bottlenecks (AGAIN)... sure, it could improve chances. As to people running into each other in
open space... well not even my fencing students do that (kids), so... if adults are doing that--what is WRONG with them, son?

But bottlenecks and like... idk... climbin' trees or something to get the "high ground" (lol)... I'm going to consider that as something one wouldn't have much time to do, nor would it be "default" for any given situation.
Then again... WHY 5-10 sword-wielding fools would suddenly want to kill you, ANOTHER sword-wielding fool (in today's world)... is beyond me.

I just assume y'all have some beers and Ultra Wings and enjoy some good times.

heheheh
VIDS!!! ... or it didn't happen.