Chrome Version       : 61.0.3130.0
OS Version: 9658.0.0

What steps will reproduce the problem?
1. Open Dev Tools, make sure "Disable cache" is NOT checked
2. Go to https://beaufortfrancois.github.io/sandbox/media/link-preload.html
3. Check out JS Console

What is the expected result?
It should be empty.

What happens instead of that?
A warning message is there:

> The resource https://storage.googleapis.com/fbeaufort-test/sample_bytes=0-
> 567139.webm was preloaded using link preload but not used within a few seconds > from the window's load event. Please make sure it wasn't preloaded for nothing.


As the preloaded video URL was used by fetch() within 676ms, I believe this warning is wrong and should not show up.

Note that I can reproduce as well when simply assigning video.src to the preloaded video URL.