Use APKPure App
Get DLNA for Chromecast old version APK for Android
Il est une simple contrôleur pour navigateur DLNA et la coulée de Chromecast.
It's a simple controller for DLNA browser and casting to Chromecast.
After NAS device to enable DLNA media service, you could also use this app to cast the media from NAS device to Chromecast.