DeArrow is an open source browser extension for crowdsourcing better titles and thumbnails on YouTube. The goal is to make titles accurate and reduce sensationalism.
With casual mode, you can keep original titles when they describe the video well enough and are clever or funny. Choose which categories of titles you want to see. You'll be able to vote if a title fits into a category or not.

Read more about casual mode on the wiki
There are currently Loading users who have submitted Loading titles and Loading thumbnails.