Hey!
After loading your website these icons pop up in the navigation bar:
The play-icon means that Brave blocked videos from playing automatically. If you click on it, you can give permissions to the website and it should work as intended.
Does this work for you, too?
(Edit: This next part could only be interesting if you actually have access to the code of the website and is not related to your problem)
While we are here: The shield icon on the left of the image above shows that some elements of your website try to load via http connections, while dianomic.com itself is loaded via https.
To be exact it seems to be a call to a google font style-sheet. If you change that link to https, this message might disappear.