Use APKPure App
Get Solid Explorer Cast old version APK for Android
Solid Explorer Classic Cast Plugin
This is a plugin for Solid Explorer which adds support for Chromecast.
Please note that this is not an autonomic application. Make sure you have Solid Explorer installed first.
The plugin doesn't have its own icon in launcher. In order to launch it, you need to open a media file in Solid Explorer and choose Solid Explorer Cast option as shown on the first screenshot. That's it.
Have fun!