FAQ
Common questions.
Calculate the total length of any YouTube playlist instantly. Playlist Lens: playback speed adjustments, per-video breakdown, and finish-by time. Free.
What URL formats are supported?
Any YouTube URL that contains a "list=" parameter works — playlist pages, watch pages inside a playlist, Share links, or just a raw playlist ID (starting with PL, OL, UU, etc.).
Why are some videos shown as unavailable?
When a video is deleted, set to private, or restricted in your region, YouTube removes it from its API results. We detect these gaps and count them separately so your total stays accurate.
Is there a limit on playlist size?
We support up to 2,500 videos (50 API pages × 50 results). Most playlists fall well under that. Very large playlists may take a few seconds as we paginate through the API.
Can I see the duration of individual videos?
Yes — the "Video Breakdown" section shows every video in order with its thumbnail, title, channel, and individual duration. You can also click any title to open it on YouTube.
How does the speed comparison work?
We calculate the total duration divided by each speed (0.5× to 3×) and show the estimated finish time if you started right now. The "Savings" column shows how much time you gain or lose versus 1× speed.
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