---
id: TASK-219
title: 'Restore streamed video progress in anime episodes'
status: In Progress
assignee:
  - codex
created_date: '2026-03-22 21:25'
updated_date: '2026-03-22 21:25'
labels:
  - stats
  - immersion-tracker
  - youtube
priority: medium
dependencies: []
references:
  - /Users/sudacode/projects/japanese/SubMiner/src/core/services/immersion-tracker/query.ts
  - /Users/sudacode/projects/japanese/SubMiner/src/core/services/immersion-tracker-service.ts
  - /Users/sudacode/projects/japanese/SubMiner/src/core/services/immersion-tracker/__tests__/query.test.ts
  - /Users/sudacode/projects/japanese/SubMiner/src/core/services/immersion-tracker-service.test.ts
---

## Description

<!-- SECTION:DESCRIPTION:BEGIN -->
Episode progress for streamed media can stay at `0%` because some remote sessions persist `ended_media_ms = 0` even when subtitle timing and watch activity clearly advanced, and the anime episode query currently treats `0` as a valid progress checkpoint.
<!-- SECTION:DESCRIPTION:END -->

## Acceptance Criteria
<!-- AC:BEGIN -->
- [ ] #1 Anime episode progress ignores zero-valued session checkpoints and falls back to subtitle/event timing
- [ ] #2 New streamed sessions persist meaningful progress even when playback-position updates are missing or sparse
- [ ] #3 Regression tests cover the zero-checkpoint remote-session case
<!-- AC:END -->