Weird bug during Youtube video playback

[ReyJohnson]

Hello. I have recently noticed a really weird glitch.

During the playback of video on Youtube I can see LinuxMint logo in the background.
At first I thought it was the transparency effect and it was a wallpaper but when I changed wallpaper, same effect remained.

I tried rebooting, refreshing the page and etc. Nothing helps.

However, I also tried switching browser to Chromium and to my surprise, Chromium did not have this same issue, so it makes me think this is firefox related.
I don't really like chromium and would love to keep using my firefox, so please help me out here.

[mikeflan]

Do you see Jesus in your morning toast?
Just kidding. I see the logo too. Very strange.

[motoryzen]

-- Do you also see that logo in the background of using vlc to play a locally stored movie or video too? That is some next-level weird stuff man. --

[ReyJohnson]

-- Do you also see that logo in the background of using vlc to play a locally stored movie or video too? That is some next-level weird stuff man. --

I haven't tried the VLC player. However, I tried using Chrome on exact same Youtube video and the logo wasn't there anymore.

[MrEen]

Almost seems like burn in, but we know it's not that from Chrome not showing it.

If you open a mostly white page of anything full screen, then switch to Firefox, is the logo gone?

[ReyJohnson]

Almost seems like burn in, but we know it's not that from Chrome not showing it.

If you open a mostly white page of anything full screen, then switch to Firefox, is the logo gone?

What I did -> downloaded full white colour wallpaper -> opened it in image viewer -> waited 10s -> switched to video.
No result, the logo is still there.

Also, I have changed the wallpaper and tried playing the video which resulted in a new logo showing.
I tried changing wallpaper to full black colour which gave me clean picture now. - This, as well as the fact that Chrome doesn't show this, makes me think of some possible transparency effect?

[gaiusbonus]

I just found this post and so I will not start an new one.
I have this problem with a customer, where I switched several computers from windows to Mint.
Writing this post I had another problem with a blinking background over Firefox. I made a video and will post a link later...

I tried to get rules, under what circumstances the logo bug can be reproduced.
First I changed the background to a test image: https://www.tillintallin.de/wp-content/ ... 0x1200.jpg
I tested with a nice violet test video on YouTube: https://www.youtube.com/watch?v=Ec_-uzReCu0
I made screenshots and searched for the background in images where I could not see it with my eyes.
Result:
The ghost image can be seen to different strength with different window sizes.
In full screen mode I can not see the image.
The ghost image appears only if the video is playing.
It disappears when you pause the video.
A new installed virtual box machine has the same bug, so I do not think it has to do with special hardware or video driver.
I even found the bug with other video sources in Firefox: https://vimeo.com/63231754

Hopefully someone has an idea for a solution that does not restrict the sceptical windows switchers in their choice of background image.
I don't want to step back because of such superficial problems.
But for the acceptance, the experience and the subconscious feeling are also important ...

I try to find time to search the right source code to search in for the bug...

[gaiusbonus]

the link to the bug-video I had while writing the previous post: https://vimeo.com/manage/videos/549224487
I have no idea what that is. Cant' reproduce it at the moment. I saw something like this before...