Open the TikTok app
Go to your profile
Tap the three-line menu in the top right
Tap Creator tools or Business suite, if available
Tap Playlists
Tap Create playlist
Enter a playlist name
Select the videos you want to add
Tap Next or Save
Reorder videos if needed
Tap Done or Create to finish
To add more videos later, open a video on your profile
Tap the three-dot menu on the video
Tap Add to playlist
Choose an existing playlist
Tap Save