Ucoz Landing Creation

We need a website builder. I registered for Yukoz.
I need to start with a simple one-page website.

Name of the site
On the left is a YouTube video. (Until I loaded it there.)
On the right of the registration button:
Name.
Mail and
Get the video for free.
The bottom text.
And
I’ll need the same page, but with a different video and text.
I'll need this for the test that works best. Then I'll take one of the pages down.
The design is the simplest. You can even do it on a white background.
I will need constant help with the settings.