Quicc automatically transcribes your video at about 90% accuracy. When it isn't sure if it caught what you said correctly, it will highlight the word in yellow.
Now for the fun part. In the captions editor, you'll need to go over the transcript and check if everything matches up. Click on a word that you want to edit and type away.
You also have the option to reset your transcript if you want a do-over. Hit the Reset Transcript button at the top to remove all the edits you've made.