If you’re letting clients upload videos directly through a CMS upload field, the main challenge isn’t just playback — it’s compatibility. Different browsers and devices support different formats, so relying on raw uploads can quickly create issues with playback and performance.

That’s why most setups introduce a Video CMS layer that automatically handles things like format conversion, encoding, and browser-friendly streaming formats (usually HLS or MP4). This way the client can upload almost any video format, and the system prepares it for smooth playback across devices.

In some projects I’ve worked on, teams used platforms like VPlayed as the video management layer. It processes uploaded videos, optimizes them for streaming, and then lets the CMS simply embed the player. That approach keeps the upload workflow simple for clients while avoiding browser compatibility problems.