The templates provided with this module only provide a starting point to get you going within your own site's theme.
Your developer should override these within the project's theme using the standard Silverstripe theming standards.
Use the variables in the templates provided to define your own templates and layout.
You will probably want to set an aspect ratio for iframe elements containing videos. The CSS aspect-ratio directive can be used for this:
.embed.video > iframe,
.embed.video > video {
width: 100%;
height: 100%;
border: 0;
aspect-ratio: 16/9;
}This is an improved, simpler method than the older methods using 56.25% top padding with absolute positioning.