I know that a company called Perfsol is developing OTT applications. I have used the services of this company a couple of times. You can get help from them in this direction. No matter if you need help with game design or code, the experts will help you understand and realise all your ideas. And at the link https://perfsol.tech/ott-app-development-company you can find a very detailed description of each of the services.
