This is solved: the video was wbem-format. When I changed it to mp4, it is seen also on mobile. The wbem worked only on large screens

Once more :)

Thanks! Problem solved.

It works! There were a cache problem first.
How could I get the font bigger?

But the problem appears when I update the WooCommerce. That’s why there is now the old version.

Thank you! Now this works.
It’s great that I always get help from here!

Thank you! It works.

I disabled all the plugins one at the time and noticed that Rank Math SEO -caused the problem; when it was off, the testimonial slider worked normally. And today they updated the plugin. Now this works fine.

Solved! You can close/remove this.

I disabled some plugins and contacted the webhotel. I have no idea how the get this better….

Thank you! Now it works great.
– I try to learn this by myself but sometimes it is not easy… :D

It looks good on your test page. What is still have wrong here?

Thanks! I added
margin-left:-140px;`
and it is fine!

Here are login details to 3 sites.