Question: How can I build a video streaming app with multi-language support and customizable features?

If you want to build a video streaming app with support for multiple languages and customizable features, Castify.ai could be a good choice. It lets content owners build and distribute OTT apps on multiple platforms with advanced ad technology and content monetization. The service supports multilanguage support and has real-time analytics and a range of ad options. It's designed to handle the plumbing and monetization so content creators can concentrate on the content.

Another good option is Daily, an enterprise WebRTC service that enables high-quality real-time voice and video. It offers global mesh networks for large-scale live streaming and has APIs and SDKs for various platforms. Daily also has end-to-end encryption and support for security standards, so it's a good choice for live events, social networks and virtual collaboration tools.

If you want a more streamlined video player experience with language support, check out Braiv Player. The service supports multiple languages with auto-generated subtitles, translations and AI video dubbing. It also has customization options like branding and animated captions, so it's good for content creators and businesses that want to reach a global audience.

Last, Agora offers a real-time engagement service with interactive voice and video. With customizable SDKs for different platforms and features like AI Noise Suppression and real-time transcription, Agora is a good choice for boosting user engagement in social, gaming and educational apps.