I think I understand the problem. Maybe someplace in the documentation it shares this information. Here's what I learned: Each browser handles video differently. IE will let you autoplay a video with sound automatically upon loading the website. (without controls) Other browsers are not so friendly. They let you auto play the video, but only with audio muted. Or you can show controls then you have different options. Not so friendly IMHO.

HI, sorry but every webmaster should know that IE11 last time was updated 6 years ago. No more support also from Microsoft. That's why they strongly promote Edge.

Video addon is Ok, IE is not anymore.

I continue this thread because I have the same issue but not the same solution (yet). In backend my mp4 plays fine but not on the live site. I guess it is because of its <source> tag which has a src="/xyz" attribute in backend but not in frontend. Here it says data-large="xyz".

With "frontend" it's meant the live site. Not frontend editing. This works as mentioned.

DOM while editing

DOM on live site

1. What template you're using there? Maybe video addon was overriden.

2. Is this video addon or video in the row?

2nd line is only for .ogg video format, not mp4.

Thanks for your answer,

1. I'm using a template custom build by my own.
2. It is the video addon. Is there another way to insert videos?

And actually I mean "data-large" attribute from this mp4 video, not ogg. So while editing it is src:

<video class="sppb-addon-video-local-source" autoplay="" controls="" muted="" poster="/motteduesseldorf.de/images/logos/logo_72_tr.webp" controlslist="nodownload">
    <source src="/www.motteduesseldorf.de/media/videos/2021/08/16/whatsapp-video-2021-07-02-at-17.29.57.mp4" type="video/mp4">
</video>

On live site it has changed to data-large:

<video class="sppb-addon-video-local-source" autoplay="" controls="" muted="" data-poster="/images/logos/logo_72_tr.webp" controlslist="nodownload" playsinline="">
    <source data-large="www.motteduesseldorf.de/media/videos/2021/08/16/whatsapp-video-2021-07-02-at-17.29.57.mp4" type="video/mp4">
</video>

And when I insert a HTML addon with following code (with src) it will work, too (while editing and on live site:

<video data-poster="/images/logos/logo_72_tr.webp" autoplay muted>
    <source src="/www.motteduesseldorf.de/media/videos/2021/08/16/whatsapp-video-2021-07-02-at-17.29.57.mp4" type="video/mp4">
</video>

Hope this will help.

Anytime you can customize (override) video addon code if you want, it's pretty easy. Just edit site.php file from it.

Read tip #6 from: https://www.joomshaper.com/documentation/sp-page-builder/sp-page-builder-3/how-to-tips

I had to replace “data-large“ with “src“ so it worked. But why is this addon's code written like that so it won't work until replacing code by the user?

Good question, but the code wasn't written by me.

Sure, I will ask dev team. Thx

I have good news for you in SPPB 3.7.15 update (READY) we fixed empty line issue.

But I tested SPPB on few pages, and we don't have "data-large" code anywhere -- only "src" is used in addon code.