Youtube favorites(Playlists) is another important thing that you have to worry about for your videos. Being favorited means that people love your videos and want to save them somewhere so they dont forget them. Lets see together some benefits of Youtube favorites.
=>You know people can find a video depending on its favorites? The more you have the higher you rank.
=> Having a big amount of favorites can bring more viewers on your videos as this builds trust to new visitors eyes.
=> Your videos are going to look more professional and people are most likely to like and watch a video that is being favorited by a lot. 
So its nice to be favorited right? Start order now...