1- Click on “Playlists” in the left vertical menu. This will load all of your playlists and also the public playlists.
2- Click on the playlist that you want to edit, under “Your Playlists”. This will load the Playlists detail page as below.
3- Click on “Edit’ button in the right, above the Playlist thumbnail list. This will load the Playlist Edit page.
4- On the Playlist edit page, the video list will be displayed on the right with thumbnails. On the right of each thumbnail, there will be video details and a button “Remove” to remove the video from the playlist. Click “Remove” button next to the video that you need to remove from playlist.
5- You can click “Save” once changes are made. This will take you back to the Playlist detail page with the updates.