Remove flashing of captions first from page with video blocks

Site URL: https://www.turtlepictures.com.au/films/art-films

Hi I'm fine tuning a portfolio/print site and trying to get rid of the flashing on this page. It has three video blocks and when the page loads the captions appear with white space and then the thumbnails load afterwards.

I have tried various bits of code to turn off animations etc but am not winning and the client wants to get rid of it before going public....

This is the code I've added but it doesn't appear to have changed anything.
 

[data-section-id="6190b06ab5d8d65b6b28f9ae"] * {
    transform: unset !important;
    opacity: 1 !important;
    transition-delay: unset !important;
    transition: unset !important;
}

Appreciate any help thanks so much.

20 hours ago, SquareRefresh said:

Hey @HelenCrozier it's default video block loading, You can't change it. Try to add site preloader if You don't want to see these spaces.

Thanks so much - that explains it all!