Sure you can video chat and even get naked and have sex with other people....wait no you can't because you have to be in person to have sex with others. Some things cannot be done virtually you actually have to be in person face to face. That said you titled this online play.Being on webcam interacting with other couples and singles has been a thing since the technology has existed. It can be fun and a good way to get to know someone. It allows for a safe way to show off and interact and it is as simple as asking someone if they would like to get on cam or do a video chat, or whatever. That said most swingers may not be interested in "going virtual" because they are actually in it to get physical. There is a lot to be said for a face to face meeting. We learned back in the 90's when webcamming was first a thing people were still not the same in person as on webcam. If nothing else there is the "barrier" of feeling safer doing things on camera versus in person. I will offer this example
Back then we spent a few weeks (maybe a couple months I can't recall) talking and teasing with another couple a couple nights a week actually having sex on camera (both couples) at the same time much like same room sex. Finally our schedules aligned and we met up at a halfway point with hotels. Dinner went well, we got a room, and then things came crashing down. Despite the couple doing all sorts of things on cam and talking a good game once the situation was real the wife of that couple panicked as she started to get undressed and broke down in tears. Turns out she was never comfortable even doing what she was doing even online and only went along to make him happy after he nagged her into it. In fact a lot of the things she said were "coached" by him before going on camera like an actor rehearsing. She never thought it would go this far and did not want to go through with it. Now there was no "clue" she felt this way at dinner or any other time because she did not want to cause problems. I feel had we met in person first her breakdown may have been avoided. I mean we have met several others who one partner was into it while the other was not so onboard and it came out rather quickly. In this case there was no signs of it and the in person conversation that may have brought that fact up was skipped due to the online activities.