AnkiWeb continues to not count these supported media formats:
WEBP has been ubiquitously supported for years
dunno if this actually applies: files in object tags (supported for over a year)
SVG since basically forever (at least those included as external files)
AVIF is about to become enabled in the last straggler (Apple again) with iOS 16
This despite it already counting & including the files during its “processing media” publishing phase.
Why not take that total instead? Or naively, if the count happens by comparing mimetypes, that could be solved by just adding the above’s signatures.