How to watch a video in parts.

I used to remember how to watch the part videos that have the 001 and 002 endings. How do you watch these I forget. This is probably the dumbest question ever. But thanks anyway!
Answer #1
Join them first using HJSplit and it gives you a single file which can be viewed normally
Answer #2
I don’t remember doing it that way before. I remember there being a easier way.
Anyways it worked but wasn’t what I did before but thanks!
Answer #3
fogest replied: I used to remember how to watch the part videos that have the 001 and 002 endings. How do you watch these I forget. This is probably the dumbest question ever. But thanks anyway!
Just add all the parts to your playlist and it will play them all..!
Answer #4
That’s what I tried at first and it would show that the second videos time was added to the first but when you went to the second parts video that area was black and couldn’t play. But anyways the joining program worked.