Use the K-Lite Codec Pack if you are on Windows. Convert: Use Handbrake to turn that RMVB into a modern MP4.
It’s free and plays almost any format. Download SouD EP12 rmvb
⚠️ Be careful with "Free Download" sites. They often contain malware or misleading "Play" buttons that lead to ads. Always keep your antivirus active. Use the K-Lite Codec Pack if you are on Windows
If you find multiple download options, here is why you might skip RMVB: Download SouD EP12 rmvb