[Feature Request] - Prefetch next episode stream while current episode is playing

[franksodre]

Pre-load for next episode:
Problem: Stremio only starts resolving the next episode's stream when you manually select it, which can interrupt the watching experience since, depending on the source, resolution can be slow.

Proposed solution: Stremio could start resolving the next episode's stream in the background while the current one is still playing, so by the time you click next, everything feels natural and smooth.