import 'package:link_extractor/link_extractor.dart';

try {
    final extractor = LinkExtractor();
    final links = await extractor.extract(
      'https://ok.ru/video/43134487273',
    );
    extractor.dispose();
    print(links);
} on UnsupportedSiteException (e) {
    print('Website not supported. { error : $e }');
}