Are you interested in observing the interaction in the video, specifically, or are you just interested in watching ants interact with other organisms?
If it's the latter, myrmecophilous interactors can be found just about anywhere. It would be helpful to know where you are, geographically--at least in a general sense. That is, are you writing us from North America or Australia, etc.?
If you live somewhere green and want something easy, try to find aphids that are tended by ants. In myrmecophilous aphids, the ants protect the aphids from predators and parasitoids, and in return, the ants are rewarded with nutrient rich excretions from the aphids. They also use aphids as a source of protein when needed. Look on stems of flowering plants during the summer; you'll likely see the ants first, so just follow their trails.
All that's to say ants farm aphids, and they're pretty easy to find. I work in Washington and Oregon, and I see this interaction from the Olympic Peninsula to the Oregon high desert and everywhere in between.
Aphids are super easy to keep. The only downside is, well, aphids. Ick. But it's fun to watch.
Lycaenid and riodinid larvae are also tended by ants, as well as hemipterans and certain families of beetles, but many myrmecophilous butterfly populations are at-risk or otherwise sensitive, and the latter can be tricky to find and care for, but I say the sky's the limit if you're curious enough. If you want to write the book on rove beetle ecology, I say go for it.
