How To Watch 18+ Videos On Youtube without Sign In

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

http://www.youtube.com/watch?v=sdinhdkLg

2. Then copy the Video Id. as above link video Id is sdinhdkLg

3. then paste the Video Id in the link to given below.

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

Replace VideoId with the Id you copy in Step 2

4. Now the url will become as shown below.

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

5. Enjoy this process is Done.