Join video files without any software

1. How to join various video files into one?
2. How to Join videos taken from mobile phone?
Do you know you can join your video files using just the windows Command Prompt without any video joining software’s.

Step 1: For example if you have 3 videos in your hardrive root drive: video1.mpg, video2.mpg and video3.mpg just rename them to a, b, and c (just the letter without the file extension).
For Eg:
ren video1.mpg a
ren video2.mpg b
ren video3.mpg c

Step 2: Open Command Prompt.

Step 3: Type the location of the drive like d: or C:

Step 4: Type: Copy /b a + b + c videoname.mpg and click enter

Step 5: Now wait till you see: 1 files<s> copied.

And type exit and press enter. Thats it.You are done!
Note: If you want to join two files, then those files must have the same extension.