Product direction
Everything below runs here today: playlist math, smart channel lists, thumbnails, transcripts, Shorts links, downloads, and API-backed metadata. A separate tools subdomain can mirror or extend the same stack when you are ready to split traffic.
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Walkthrough
Short overview of how playlist links map to total duration, ranges, and playback speed — same flow as the calculator above.
Playback is provided by YouTube's embedded player.
Quick answers about playlist totals, the YouTube Data API, and how to use this calculator.
From the blog
Guides on playlist length, watch time, playback speed, and how the YouTube Data API powers this tool.
A deep, practical guide to understanding playlist duration, how APIs measure totals, playback speed, ranges, and how to interpret numbers when videos are missing or region-locked.
10 min read
How playlistItem and video resources relate to duration fields, quotas, and why some videos may be missing from a total.
6 min read
Why full duration stays the same at 2× speed, how wall-clock time is estimated, and how to plan longer courses or series.
4 min read
