In this article Im going to show you how to join different video files like as MPEG DAT MPG mp4 AVI etc. and convert it one video. You can join your video files using just the windows Command Prompt. No need of any video joining software. The best method to follow is shown below. Step-1 For example if you have 3 videos in your hard drive root drive and just rename them to a b and c (just the letter without the file extension). Example Rename uae uae a (without .mpg) Rename uae uae b (without .mpg) Rename uae uae c (without .mpg) Step 2 Now open Command Prompt ( winkey + R) or Start3Run3 cmd. Step 3 Then your location like C D E etc. Step 4 Type this code Copy a + b + c and press enter Or copy + Step 5 Now wait till you see 1 files