Analyze how the YouTube algorithm currently works for the [niche] niche.

Tell me precisely:
1. The video length that maximizes watch time.
2. The upload frequency that drives fast growth.
3. A tags strategy that still works in [current year].
4. How to A/B test thumbnails.
5. How to get my videos into suggested videos.
6. A community post strategy that drives engagement.
7. A Shorts strategy that feeds the growth of the main channel.
8. What to do in the first 24 hours after publishing to get the biggest push.

Close with a weekly checklist I can follow.