Step by Step Tutorial:
Step 1 Add files :
Press Add File Button to add source video files.
Step 2. Merge ( Press Merge Button to make futher settings) :
Step 2.1 Select Encode Mode as the Merging Mode:
Step 2.2 Press OK to further configue output format:
Press Advance Button to further costumize output settings as you like:
Step 2.3 After pressing OK, select an output folder as you like.
Step 3. Merging finished. Open output file.