increasing the limits in the voice channel with the camera

On the site, each member is deaf and uses sign language. In the voice channel, when the webcam is on for 25 people, where they talk to each other in their own language, they comment next to the chat, unfortunately the service has grown and more and more people want to enter the conversation or write in the chat and watch how others talk, sign with each other, but however, the problem appeared, it shows that there is a limit of 25 people fired. I would like the website to be dedicated to the deaf, most people like to talk about games, game education, useful information, help in player development, and I even organize tournaments for the deaf with a small prize, games, meetings, so more and more people are interested. During the tournament when they are streaming and flashing as a commentator on the webcam, when the limit of 25 people appears, others also want to watch but cannot enter to watch the commentator flashing on the webcam. Some other deaf people have difficulty understanding what they write in the chat, so many people prefer to have them on the webcam and it is easier to communicate in sign language.
My members on our server would very much like the voice channel with camera to increase the limit