Bard lets you re-write people's words in videos, and satisfy your innermost desire to become world's greatest trollmaster... um I meant storyteller. How you say? Well, you have been granted the ability to disassemble a video into a stream of words that can be pieced back together to your liking. All you need is a link to a youtube video.
Make Trump sound presidential, or make the Lannisters say 'never give you up'. Now, use your jedi powers wisely. To borrow a famous line, let's just say that "With great power comes great responsibility".