I don't have Flash installed (for security reasons; the darn thing has more holes than Swiss cheese) and I don't recall having any problems watching YouTube videos in the last few months.

"fancy F in a circle" sounds a lot like Flash. Try not to install it when you do a fresh install of the system and see if it helps.

You forgot to tell us what video formats are supported (and not) by your Firefox according to https://www.youtube.com/html5 page.

O' Tay - this what I got, fresh install - checked youtube no issues. installed just terminology via sboinstall, got issues - it now is showing me an arrow to click on in the video where that F shows to get the video to work. Already --- I think my plugin is still there let me yank that out and see what up.

http://imgur.com/a/ckmwE

this is the image I am getting - I pulled flash plugin out and it is back to this again . The only install I did afterwords is installing terminology via sboinstall (sbotools) then it went to where that F is at it shows an arrow instead that I had to click on to get it to load and show.

Now that the flash plugin is no longer there it is showing me that F again

put plugin back it worked having to click the arrow.
installed mhsetroot that installs imLib2 as well
no more video just that F in that photo link

Try renaming your ~/.mozilla directory to something else:
This will force Firefox to create a fresh profile. It could be that your current profile is messed up in some way.

If you'll want to get back to your old profile:

you know I did that already, it worked until I killed firefox then reopened it then it was back to youtube not showing videos again.

Webm is a container format but the codecs used seem to be VP9, VP8, Opus, aac, Vorbis and h264 (I'm actually looking at the codec used in a few videos).

Could there be an issue with terminology?

Try bleachbit. Its what Hillary used on her email servers! It will get rid of those pesky caches.
https://slackbuilds.org/repository/1...arch=bleachbit

lmao so Hillary is your hero? lol quick get rid of all traces of emails I just got a be president. I just got a' my hubby got no more books in him to support me -- and I'll be out of a job soon if I don't make president.
haha that means I got a sit and read everything before saying ok... oh my..

seeings how I just started using that again and this was doing this before I even started using terminology -- it'd seem to fall into the NO why should it. it seems anything outside of the Install interferes with it to me.

You're right about WebM being a container format, but (according to Wikipedia) WebM can only contain VP8/VP9 video and Vorbis/Opus audio streams, so I was using the term "WebM" loosely to mean these codecs. For H.264 video and AAC audio the container format used (at least by YouTube) is MP4.

Still, this doesn't help BW-userx to solve his problem. And I have no idea how to help him, because it's very hard to understand his posts (at least for me). For whatever reason he communicates very unclearly, ignores some of the questions asked, and all this make me feel frustrated.

I stated this previously and I'll state it again -- on a fresh Slackware (14.2 or -current, it doesn't matter) installation using fresh Firefox profile YouTube should work out of the box, at least videos encoded in VP8/VP9 (and most of them are).

4 members found this post helpful.

No, she actually convinced me to vote for Trump after her Syria no fly zone and anti-Russia antics. I wasn't going to vote for president or vote third party. She pushed her husband and Obama into wars. She is honest when it comes to her war. I didn't want her to shoot down Russian planes. I knew that Trump was going to continue the quagmire in the Middle East using the war on terror related xenophobia as cover for imperial designs that have nothing to do with 9/11 (no change in policy starting with the Iraq war). I enjoy how he has the whole western part of the Empire in an uproar but he isn't going to do anything and he isn't going to turn the American Empire into a successful business. He is trying to get other countries in the American Empire to fund the imperial burden rather than just use the US. The Gulf States might pay for the destruction of Iran and what they view as heretics, but the Western Europeans aren't going to pay their share of the imperial cost while they push for nuclear war with Russia. The Germans recently told Trump that they aren't going to pay their 2% while the US is wasting 3% on NATO.

1 members found this post helpful.

You are right, I just think he needs to verify if its a Firefox problem or is it something else. Is only Firefox doing this? Seamonkey work? Mplayer? Xine?

1 members found this post helpful.

I do not know what I am not conveying here --

it is this simple I have a fresh install of Slackware 14.2 current. It is now looking like as soon as I install something/anything past what gets installed afterwords youtube no longer plays the video. It just has that fancy F where the video is http://imgur.com/a/ckmwE

I installed Adobe Flash plugin ~/.mozzia/plugins and as it stands right now it will play some videos but only if I click the arrow that now shows up in place of the big F that is in that image.

it seems I am the only one with this issue. Why? I do not know.

if I was having issues with these I'd have said something about them too .. fyi But I am checking Monkey not that I want to use that one if it works, if I did what to use that one I'd be using it and not firefox.

I forgot I even had Monkey btw nevertheless it works even after I pulled the flash plugin, and firefox went back to only sowing a F in the black screen again. http://imgur.com/a/ckmwE

What sbopkgs specifically are you installing before Firefox messes up? Are these fresh packages from slackbuilds built on the latest Current?

Is this with your shared home with your Void install? Maybe you should try with a fresh user?

And to verify, it should be in ~/.mozilla/plugins, not ~/.mozzia/plugins

I do not fully understand that last part - only this I can submit to you is: using sboinstall puling off of https://slackbuilds.org/repository/14.2/ (i do suppose) a fresh build of terminology screwed it up. I am not going to install Slackware again as it stands at this moment. I already re-installed it 4 times over this. just saying every time it works right after the install as soon as I add something else it no longer works. why I do not know. it makes no logical sense whatsoever to me.

sbotools is a precompiled tgz I got saved I do not remember how I got that one, off the sight or slackbuilds I have no /etc/sbotools dir after installing it, as per https://pink-mist.github.io/sbotools...ls.conf.5.html