I’ve seen this done in a few combo videos before (I forget where the first one was), but I just found it recently while I was surfing YouTube. It’s here
And he does it at 1:35 -ish.
Thanks in advance for any help and if you can at least give me a name for the trick so I can begin to look around for it.
it looks like he kinda just starts in trapeze, whips string over, whips yoyo over back onto the string for a second, whips string over,whips yoyo over back onto the string etc