Unfortunately, you cannot directly copy and paste a Spotify playlist. However, you can share a Spotify playlist or duplicate it to your own account. Here's how you can duplicate a playlist:

1. Open the playlist you want to duplicate.
2. Click on the three dots (or '...' more options) and select "Add to Playlist".
3. Create a new playlist and all the songs will be added there, effectively duplicating the playlist.

And if you want to share a playlist:

1. Open the playlist you want to share.
2. Click on the three dots (or '...' more options) and select "Share".
3. You then have the option to share the playlist link to different social media platforms or copy the playlist link to send it directly to someone.

Remember, you need to have a Spotify account to perform these actions.