initialize method
Implementation
Future<void> initialize() async {
bool _validURL = Uri.parse(url).isAbsolute;
if(!_validURL) {
throw ArgumentError.value(
url,
'Invalid url.',
);
}
if(kIsWeb) {
_textureId = (await _videoPlayerPlatform.initPlayer(url)) ??
kUninitializedTextureId;
}
}