Not playing videos on youtube

[jury68000]

Win 7 - Seamonkey 2.53.1
When opening a video on youtube I get the standard black rectangle for the video content, and thats it. It stops showing this black rectangle and spins the circle in the middle of the rectangle forever. Also when on the main site of youtube.com, the list with videos shows only grey rectangles and nothing inside.
What is wrong or missing?

And this is at work, but when I installed Seamonkey 2.53.1 at home on Mint 18.3 machine, all is fine, youtube works properly.

[-Px-]

There is some issue with your profile, possibly some broken add-on, try Help - Restart with Add-ons Disabled, and see if this help

[jury68000]

Sorry, I forgot to mention this. I already tried this Help - Restart with Addons Disabled (as I found this as a solution somewhere on the web already last week)
But it did not help. Generally, it should be a clean install so there should not be any add-ons, weird configurations done by me , etc. Its my first shot at Seamonkey, and I have this behaviour on Windows platform since the beginning, and that is 3 work days now and no solution found so far.

[James]

I wonder if you have a N edition of Windows 7 as it does not come with the media feature packs that provides the needed codecs to fully support HTML5 players.

https://support.mozilla.org/en-US/kb/fix-video-audio-problems-firefox-windows

On Linux you would need FFmpeg for example.

[jury68000]

I wonder if you have a N edition of Windows 7 as it does not come with the media feature packs that provides the needed codecs to fully support HTML5 players.

Didn't know about the N editions so I have read about it and yes, my country is listed on Microsofts N editions list.
But it seems that I'm not on N edition and if so, then the media pack is already installed as I tried to play music or video through Windows Media Player and it played them fine.

Edit:
And also youtube plays fine on other browsers: Opera, IE11, Brave, Chrome

[ElTxolo]

Win 7 - Seamonkey 2.53.1
When opening a video on youtube I get the standard black rectangle for the video content, and thats it. It stops showing this black rectangle and spins the circle in the middle of the rectangle forever. Also when on the main site of youtube.com, the list with videos shows only grey rectangles and nothing inside.
What is wrong or missing?

And this is at work, but when I installed Seamonkey 2.53.1 at home on Mint 18.3 machine, all is fine, youtube works properly.

Please perform the following tests:


• HTML5 Video Capabilities Tests
  
• HTML5 audio/video tester
  
  
  - Personally, I have NO problems with YouTube videos using SeaMonkey 2.53.1, 2.53.2 or 2.53.3 on GNU/Linux
  (on Debian Sid, Debian Testing, openSUSE Tumbleweed, ArchLinux or VoidLinux)
  
  
  
  
  
  
  
  
  Cheers!!

[jury68000]

Please perform the following tests:

[*]HTML5 Video Capabilities Tests

Some of the links play fine, some do not play.

[*]HTML5 audio/video tester

This test gives below results:

Capability Test Result (canPlayType)
HTMLVideoElement supported
MP4/H.264
avc1.42001E, mp4a.40.2 probably
WebM VP8
vp8.0, vorbis probably

Media Source Extensions Support:
Capability Test Result (isTypeSupported)
Media Source Extensions supported
MSE & H.264
video/mp4; codecs="avc1.4d401e" supported
MSE & WebM VP9
video/webm; codecs="vp9" supported



I have also run the test on https://www.youtube.com/html5
and it says:

Code: Select all

"Excelent choice!
Yes. Your browser is up to date, and that means that you can use all the newest functions of YouTube. Have fun!"

- Personally, I have NO problems with YouTube videos using SeaMonkey 2.53.1, 2.53.2 or 2.53.3 on GNU/Linux
(on Debian Sid, Debian Testing, openSUSE Tumbleweed, ArchLinux or VoidLinux)

Well, at home, on Linux Mint 18.3 I do not have any problems with SeaMonkey also. Its just at work on Windows 7 those problems show up.

[ElTxolo]

Win 7 - Seamonkey 2.53.1
When opening a video on youtube I get the standard black rectangle for the video content, and thats it. It stops showing this black rectangle and spins the circle in the middle of the rectangle forever. Also when on the main site of youtube.com, the list with videos shows only grey rectangles and nothing inside.
What is wrong or missing?

Please, check out these old threads, with similar problems to the one you have:


• YouTube only showing grey placeholders
  
  
• YouTube problem
  
  
  
  
  
  
  
  
  
  
  Cheers!!

[jury68000]

I've read those threads (nothing there helped me) and now I'm pretty sure that the problem lies in the configuration of security/antyvirus... what is nothing I can do about. Thats pity, as I'm looking for some decent browser I could use at work and all not 'mainstream' browser I tried so far fail hugely at delivering web content

[ElTxolo]

I've read those threads (nothing there helped me) and now I'm pretty sure that the problem lies in the configuration of security/antyvirus... what is nothing I can do about. Thats pity, as I'm looking for some decent browser I could use at work and all not 'mainstream' browser I tried so far fail hugely at delivering web content

• Fix common audio and video issues
  
  
• Can't load websites but other browsers can
  
  
  Have you already tried SeaMonkey in Safe Mode (via Help > Restart with Add-0ns disabled)
  or by creating and using a new clean profile?
  
  
  
  
  
  
  
  
  
  
  Cheers !!

[4td8s]

I've read those threads (nothing there helped me) and now I'm pretty sure that the problem lies in the configuration of security/antyvirus... what is nothing I can do about. Thats pity, as I'm looking for some decent browser I could use at work and all not 'mainstream' browser I tried so far fail hugely at delivering web content

what kind of internet security or antivirus programs are you using, jury68000?