How to add Subscribe Button on Video Youtube

How to add Subscribe Button on Video Youtube. Just Follow this step

Follow 6 steps:
1. Login to your account YouTube
2. Click "My Channel > Video Manager > Channel > InVideo Programming"
3. Click "Add a watermark > Browse > Find your picture
4. Click "Save" to get it work
5. Select display Time
              - End of video : if you want show your Subscribe Button at the end of video
              - Custom start time : if you want show your Subscribe Button at Custom start time
              - Entire video : if you want show your Subscribe Button from start to the end of your video
6. Click "Update"
Hope you enjoy it

Follow this video