RGBlink UMS4 plus User Manual page 18

You can check the video you want to display in the
local folder, and then click "Open",the video will be
imported into the software.
The added media will be shown in【Media source】
list.You can check the media information, including
name, type, resolution, duration,and path.
Click the icon to delete the media.
Left-click the video, audio or picture in the media list in
the right column and drag and drop them into the time
axis as shown in the picture.
UMS4 plus User Manual
18