Video · CMU Database Group
19 - Query Optimizer Implementation I (CMU Databases / Spring 2020)
Total watch time
1h 30m
at 1× speed · exactly 1 hour, 29 minutes, 56 seconds at 1×
Next time, skip the copying: change youtube.com to playlistduration.com in any playlist, video or channel address and it opens here.
For your README
Embed a badge
Show the length in a README or course description — it links back here and updates itself
Markdown
[](https://playlistduration.com/video/q4NeEGMoKmc)HTML
<a href="https://playlistduration.com/video/q4NeEGMoKmc"><img src="https://playlistduration.com/badge/video/q4NeEGMoKmc.svg" alt="Length: 1h 29m 56s" width="135" 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/video/q4NeEGMoKmc returns them as JSON — free, no key. API docs →
Data from the YouTube Data API as of 2026-10-27 (cached).