I didn't realise I needed this until I saw it as a feature in my Adfree Youtube app on my LG TV. I actually don't mind the arrow thumbnails, but I'm growing to really appreciate (and contribute to) the title swaps. The thumbnail swaps feel too obvious and ugly, but the Titles feel very transparent and get to the heart of what as video is about (this is I think personal preference, I guess I don't mind "sensational" imagery to grab my attention as long as the Title is descriptive) I find I'm both avoiding videos I have no interest in, but also actually finding new creators thanks to their "de-arrowed" video titles. You can re-arrow titles with a single click (I presume this does the same with thumbnails too).

The free activation took me about a day, and honestly now I've started using it think I will contribute, at the least I've already contributed with a few titles of my own. Your license also syncs with your Firefox Sync, which I was surprised about for the free license.