If you still want to use Hangouts for a group video chat session, you can revert back to version 35.0.327050771 to do so. But there is a major caveat. With many phones updating automatically, you just might find that everyone else you know has updated to the very latest Hangout version-you know, the one without group video chat capabilities. And that would leave you without the ability to chat on video with other Hangouts users.
Another option to consider if you need to video chat more than 10 people at no cost is Google Duo. But there has been talk about Google replacing Duo with Meet. So when it comes to group video for Android users, it appears that you should stick to being consumer of Meet.