Video Will Not Play In Pale Moon. Topic is solved

[pmBill]

That must have been a problem with their page?

The link you gave says:

Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.9) Gecko/20100101 Goanna/3.4 Firefox/52.9 PaleMoon/27.6.1

And now the two links I gave allow the MP4 to be played and show MP4s as playable.

And I didn't do anything.

And the OP link and the other link I gave and the "animated GIF" (MP4) link I gave all work.

(sometimes I have to or it helps to have Ad Block Latitude turned off, which I had tried before)

Oh, well.

PM did crash and I think locked up and I had to quit it hard (Ctrl-Alt-Del), and I probably re-booted somewhere
in there (which I had also tried previously), so maybe that did something.

But the Facebook Notifications drop-down still isn't working.

[illiad]

Ah, looks like 'result'!!
what I would do though, is first use http://www.palemoon.org/backuptool.shtml or FEBE to save it all, then uninstall pale moon, and use CCleaner to remove any remnants left behind...

then do a fresh install, checking operation is still good..

I know facebook fiddles with their security encoding to catch any crooks, my work uses extra secure AV, that stops it getting though.. could be why..

[pmBill]

This page:

http://www.quirksmode.org/html5/tests/video.html

Says PM (FF 4.0b11) doesn't support H.264/MP4.

Similarly for this page:

https://www.youtube.com/html5

So that is at least part of the problem.

Now it's broken again. WTF?!?

This video won't play. Says HTML5 is not supported. But other YT videos play.

https://www.youtube.com/watch?v=3J16mRv9Yyw

EDIT:

M$ installed HEVC (again?) on 1/8 and I only had a problem today. (certain YT videos)

I looked in Windows 10 Apps and Features, did a search for HEVC, found it this time (before I couldn't),
uninstalled it, rebooted, and now it works.

[Aoife]

I searched for, found, and uninstalled HEVC, rebooted, and now I can view videos in Facebook and Twitter again.

Yay!