Watch 18+ Videos On youtube without signing in

1. First get the Url of video you want to watch. As shown below.


EG;
https://www.youtube.com/watch?v=cRR4olX2FPM 
  2 Then copy the Video Id. For above link video Id is cRR4oIX2FPM

 3. Now paste the Video Id in the link given below.

http://www.youtube.com/v/VideoId?fs=1

• Replace VideoId with the Id you copied in Step 2

4. Now the url will become as shown below.

http://www.youtube.com/v/4Xkh6j7RMqk?fs=1

5. Done.