Here's a step-by-step guide on how to create a playlist on YouTube:

1. Log in to your YouTube account.
2. Find a video you want to add to your playlist.
3. Click the "Save" button below the video.
4. Select "Create new playlist".
5. Name your playlist and choose whether you want it to be public or private.
6. Click "Create".

You can also add more videos to your playlist by clicking the "Save" button below each video you want to add and selecting the playlist you just created.

To view, edit, or delete your playlists:

1. Click on your profile picture in the top right corner of the screen.
2. Select "Your channel".
3. Click on the "Playlists" tab.

From there, you can view all of your playlists and make any necessary changes.