PageSpeed Insights seemingly cannot download MP4s - negatively affecting score
Author: rgpublicCreated Sep 3, 2026Updated Sep 6, 2026
Labelsbug
FAQ
- Yes, my issue is not about variability or throttling.
- Yes, my issue is not about a specific accessibility audit (file with axe-core instead).
- Yes, my issue is not answered by other FAQs.
URL
What happened?
The mp4 video on the page results in:
Failed to load resource: net::ERR_CONNECTION_FAILED
This reduces the "Best Practices" score :-(
What did you expect?
Either download the video properly or at the very least not mark this as a violation of best practices - it's a normal video.
What have you tried?
No response
How were you running Lighthouse?
PageSpeed Insights
Lighthouse Version
(PSI, current version)
Chrome Version
(PSI)
Node Version
No response
OS
No response
Relevant log output
Source: GoogleChrome/lighthouse