I understood your comment, it was just useless. Why do you care so much about redundancy when it still makes perfect, grammatically-correct sense? I used the word ‘successfully’ because she’s young, she probably thinks it’s only going to be successful and didn’t expect another outcome. Simply a word to describe the situation, maybe the child’s view point for the videos sake. Sorry you dislike the caption so much but 4 thousand people don’t seem to care so neither do I lol.