Summary

This change fixes a false-positive gap recovery path at the tail of static VOD playback. In some assets, once the last media segment has already been requested, StreamProcessor can enter the "no media request generated" path even though playback is effectively complete. The previous ordering applied static-manifest gap adjustment before checking for completed buffering, so the VOD tail could be treated like a manifest gap and trigger an unnecessary internal seek near the end of the period.

The fix handles completed buffering first and only falls back to gap recovery when playback is not actually finished. It also uses the current period end, rather than the MPD presentation duration, when deciding whether a small tail-time adjustment is still valid for static content.

Why this is needed

• static VOD tail conditions should not be classified as manifest gaps
• once the final segment has already been requested, the player should prefer completion handling over another seek-recovery attempt
• period-local end checks are safer than MPD-wide duration checks for tail handling, especially in multi-period content

Testing

• not run