I did some further investigation into my settings in the adblocker / exceptions / lists area because I think that's where the problem is:

I found something that makes a small difference if I remove it. It's a list I added in 2024 but I haven't had any problems with it so far:

If I remove this list, the videos load when the page loads (the video frame is no longer black without the video) and can be started, but the other problems (which I think are related to Opera's behavior) remain:

• when the page loads, the videos start by themselves, without me giving the "play" command
• when the page loads, the videos are on "mute" and must be put on "unmute"
• when scrolling down the page, when the video clip goes off screen, a pop-up appears with the clip in the lower right corner of the page, without me asking for this
• when scrolling down the page, when the video clip goes off screen, a pop-up appears with the clip in the lower right corner of the page, which restarts even if the clip in its main frame was stopped, without me asking for this

I mention that all the settings for detached video and for Video Popout | Picture-in-picture video are disabled, but Opera does not apply these settings:

These are unwanted behaviors that should not exist.

I would like the videos to be stopped on page load (and not start on their own even if I scroll the page) and to be unmuted. Now it is the opposite.

Just updated to the new version:

From:
Versiune Opera One: 129.0.5823.15
Versiune Chromium: 145.0.7632.117

To:
Versiune Opera One: 129.0.5823.28
Versiune Chromium: 145.0.7632.117

Unfortunately nothing changed. The problem is still here: black screen instead of video (with adblocker enabled) and unwanted behaviour (with adblocker enabled and site added to exceptions).

I don't understand why non-working versions are published, instead of maintaining in place the last 127 working version, until the problems will be solved.

@Mlipka No, it's not enabled:

@Mlipka No, I don't have any other AdBlocker (excepting Opera AdBlocker).

Example for https://stirileprotv.ro/stiri/doctor-de-bine/combinatiile-de-alimente-care-iti-potenteaza-nutrientii-si-aduc-beneficii-mai-mari-decat-suplimentele-alimentare.html

Console with adblocker on and no exceptions added (video does not load):

Console with adblocker on and website added to exceptions (video is loaded):

I see that I can't attach har file (for network) or console log file.

@Mlipka Just updated to the new version:

From:
Versiune Opera One: 128.0.5807.77
Versiune Chromium: 144.0.7559.173

To:
Versiune Opera One: 129.0.5823.15
Versiune Chromium: 145.0.7632.117

Unfortunately nothing changed. The problem is still here: black screen instead of video (with adblocker enabled) and unwanted behaviour (with adblocker enabled and site added to exceptions).

I think this 129 version should also be withdrawn as soon as possible to avoid spreading and replaced with 127 working version., until the problems will be solved.

@Mlipka In order to avoid a fresh install, and to update automatically to all users, it would be possible to publish an update that in fact is the last working version (127), obviously with a version number greater than the current non-working version?

@burnout426 So, to summarize, until now we have three behaviours in Opera 128:

• @leocg: with ad blocker on: video doesn't even show, its space is blank. With ad blocker off, I got a Media Element Error: Format Error message
• @burnout426: video ok / no error
• @misterrr: with adblocker on (and no site added to exceptions): instead of video I get a black frame with no video / with adblocker off (or site added to exceptions): I get no error, the video plays but with unwanted behaviour

Strange...

@Mlipka Ok. I hope that in the next Opera update the problem will be solved. I will keep you informed.

Thank you all!

@burnout426 Yes, but I think that in order to be able to play the videos with adblocker on, you have to add the site to exceptions. In Opera 127 that was not necessary.

@leocg Also, if DNS blocking were active, videos would be blocked regardless of Opera adblocker enabled or disabled.