Playlist · Freesciencelessons
A Level Biology (Year 13) "Homeostasis and Excretion"
Total watch time
2h 18m
at 1× speed · exactly 2 hours, 17 minutes, 51 seconds at 1×
At an hour a day you'd finish in 3 days
The shape of the course
Each column is one video, to scale
WatchedTo watch
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Your plan
Plan to finish
About 3 days at an hour a day
Pick a daily pace and the days you'll watch. Ticked videos are skipped.
At one hour a day, every day, this playlist takes about 3 days. Turn on JavaScript to plan around your week.
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Videos (26)
2h 18m in total · tick what you've watched
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For your README
Embed a badge
Show the watch time in a README or course description — it links back here and updates itself
[](https://playlistduration.com/playlist/PL9IouNCPbCxUAkZC0-0E2okBMWpNjrYPx)<a href="https://playlistduration.com/playlist/PL9IouNCPbCxUAkZC0-0E2okBMWpNjrYPx"><img src="https://playlistduration.com/badge/playlist/PL9IouNCPbCxUAkZC0-0E2okBMWpNjrYPx.svg" alt="Watch time: 2h 18m · 26 videos" width="203" height="20"></a>Add ?speed=1.5 to the image URL for the time at that speed, ?label=Course to change the left text, or ?style=flat-square for square corners.
Want the numbers themselves? GET https://playlistduration.com/api/v1/playlist/PL9IouNCPbCxUAkZC0-0E2okBMWpNjrYPx returns them as JSON — free, no key. API docs →
Data from the YouTube Data API as of 2026-10-27 (cached). Private or deleted videos are excluded from totals.