[Idea] Feature Request: Ability to load External Subtitle URLs (VTT/SRT) for Live Streams

[almoukdad293]

Before you suggest this (required)

• I read the User Guide and checked the app's Settings and existing functions — this isn't already possible.

• I searched existing issues and this isn't already requested.

The idea

Hi, thanks for the great project!
​Could you please add support for loading an external subtitle track via a URL when playing Live TV streams?
​Currently, the player only reads embedded tracks. Many of us use local servers or tools to generate live-updating .vtt files for foreign channels, and it would be incredibly useful to pass that local URL directly to the player.
​Since the project uses react-native-video (or ExoPlayer), it should be a straightforward addition using the textTracks prop:
<Video
source={{ uri: streamUrl }}
textTracks={[{
title: "External Subtitle",
language: "ar",
type: "text/vtt",
uri: "http://local-server-ip:8000/sub.vtt" // User-provided URL
}]}
selectedTextTrack={{ type: "language", value: "ar" }}
/>
Adding a simple "Load Subtitle from URL" option in the player UI or channel settings would give users much more flexibility, especially for channels that lack native subtitles.
​Thanks for considering this!

Why — the problem it solves

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How you'd expect it to work

No response