If you are looking for information regarding the app, the focus is usually on streaming performance and compatibility:
The gold-standard homebrew media player for the DS, capable of playing DPG videos and MP3/FLAC music. DS.mp4
Tools like DPG4X allow you to drag and drop your .mp4 files and convert them into the lower-resolution .dpg format required. 📂 Using Synology DS Video for MP4s If you are looking for information regarding the
For the best compatibility across mobile and TV apps, many users recommend converting files to an MP4 container with 2-channel AAC audio using tools like Handbrake. Community Experiences DS.mp4