Dear Client - Yes, there are several open-source projects available that can provide the functionality you need for your video streaming portal. Here are a few options:
MediaCMS - MediaCMS is a free and open-source media content management system that can be used to create a video streaming website. It is written in PHP and uses the Laravel framework. MediaCMS provides a user-friendly dashboard, inbuilt video player, and an admin panel with a variety of features such as managing movies, shows, and sports videos, subscription plans, payment gateway integration, social login, user management, and much more.
Streama - Streama is another open-source video streaming platform that can be used to create a Netflix-style website. It is built on Java and provides a responsive design, user-friendly dashboard, and an admin panel with features such as managing movies, TV shows, and other video content, creating user accounts, playback controls, and more.
OpenFlixr - OpenFlixr is a media server software that can be used to stream movies, TV shows, and other video content. It is based on Linux and provides a web-based interface with a range of features such as media library management, subtitle support, Plex integration, and much more.
Jellyfin,....
All of these projects have different strengths and weaknesses, so it is important to evaluate them carefully and choose the one that best fits your needs. Let's discuss on the requirement in case you need ping me :)