isUqloadUrl function
Checks if the provided URL is a valid UQLoad URL
Implementation
bool isUqloadUrl(String url) {
final uqloadRegex = RegExp(
r'^https?://(www\.)?uqload\.[a-z]+/(embed-)?[a-zA-Z0-9]{12}\.html$',
caseSensitive: false,
);
return uqloadRegex.hasMatch(url);
}