If you want to join some video files together, you need to open these files in Video Converter and then convert them into one of the formats, the one you wish. The opened files will be stick together automatically in the order, they are given in the window "Source files".
If you want to change the sequence of the files, please use the buttons "Arrow up"/ "Arrow down".
NB: the function "Split files" should be disabled; otherwise, the process of sticking the files will not be performed.