How to Add Filter Effect to your Videos in YouTube

In YouTube gives you ability to apply filters (Vintage, Sepia, Black and White,...) to your videos.
To access this feature:

1- Sign-in to your YouTube channel

2- Go to My Channel  >>  Video Manager  >>  Videos

3- Select the video you want to edit  >>  Click on Edit

4- Click on the "Enhancements" tab

5- Go to the Filters tab

6- Select a filter 

7- Click on Apply

That's it!!