(Only for iPhone X, XS)
Record Animoji videos with unlimited duration with this standalone app.
This app uses the private AvatarKit framework, the same one that''''s used by Apple''''s iMessage app. It leverages ReplayKit''''s screen recording capabilities to allow for longer recordings than the standard app.

You can also choose to record with or without audio.

Top features:

Record Animoji videos with unlimited duration
Customize the background color
Live stream your Animoji to services like Mobcrush and Periscope
Record Animoji videos without pausing audio playback from other apps (when microphone is disabled)

Karaoke mode

Lip sync to your favorite songs using Karaoke mode. Tap "Configure Karaoke", search for the song you want and select it.
When you press record, the song will automatically start playing and will be recorded with your Animoji video.

Caveats

Make sure your phone is not on silent mode.
Karaoke mode requires a premium Spotify subscription and the Spotify app to be installed on