Question: how to open vts files?
Answer: Click Media. It's in the top-left corner of the VLC window. ... 
Click Convert/Save. It's near the bottom of the drop-down menu. ... 
Click Add. ... 
Select the VTS file you want to convert and click Open. ... 
Click Convert / Save (Windows Only). ... 
Choose Video - H. ... 
Click Browse. ... 
Enter a name and select a location to save the video file.