joomla 3.9.1 and background video 2.0.9 - no video

Hello Haind.
I decided to purchase another extension from you as the support was excellent, las time when I purshased my other extenion mid 2017.
I have tried to add this video and to play it as a background but no luck
and i have also uploaded the 2mb file locally and no luck

I have searched for the section ID as Gdraon explaind, i thought it might be ".uk-section-default" but again no luck

The position display background Video must have ID as Gdragon explained
tried also some clases like: .uk-section-default .uk-section-overlap .uk section-large .uk-background-cover
Could only find 1 section called "section"
But still no luck
www.servidordedns.es/test/index.php
Can you help me out here please?
Hoping to hear from you again.
Regards,
Paco
Ps. Will send you the credentials via email

Dear Haind.
Many thanks for your effort! ! !
I think we are on the right track, but we are not there yet.
Ede browser:
When opening the link in Edge browser there is no background. But what I do get is a toolbar on the footer of the browser
where i can click on play. and it displays it in the toolbar on the left hand side. With sound
Firefox browser:
Same behavior as on Edge. But here i do see the background video just beneath the header image with sound.
Chrome browsers:
Same behavior as Firefox

Let´s try something "easier".
Can we make it to work only on the top part as here but WITH sound and no toolbar on the footers browser?
Like here: servidordedns.es/test/index.php/about

many thanks in advance for your effort.
Hoping to hear from you again.
regards,
paco

Hello there Haind.
Thank you very much for replying.
Please see you email inbox with more details.
Hoping to get this resolved with your help.
Awaiting your instructions.
Cheers,
Paco