CupCut is a video editor made by the same company that is developing TikTok at this moment. New features are coming quite frequently and this editor is becoming more and more feature-full offering some unique features in addition.
In case if you missed it: recently it got the Facial Effects category that can be applied to faces on your videos. It can be accessed from the Effects section where you can find Image end Emotions tabs. This feature came in one of the recent updates and should be highlighted if you haven't seen it before.
Apart from this, video preview was also optimised to speed up your edition process in the latest update.
"We've introduced and upgraded some features to help you make amazing videos
1. Previews have been optimized to help speed up video editing"