.UM4 File

File extension um4 is mostly associated with some types of 4K Smart TVs developed by Samsung Company and used for the default 4K video recording format.

The um4 file stores video in 4K resolution (video is standard H.265, audio is standard AAC) captured by Samsung Smart TV television. The UM4 container is encrypted.

How to open:

As far as we know, you can only playback .um4 files on certain 4k Smart TVs from Samsung.

How to convert:

A conversion to standard video formats may be possible.