If you are interested, I can give you some advice. When looking for a reliable vendor for OTT platform development, carefully study the package of cases, for example, you may be interested in Tizen development which is done by Oxagile, learn more here. The list of partners, successfully completed projects, their experience and the problems they faced will help you understand how the development company approaches the challenges. I have confidence in this company and that's why I recommend them to you.