So, with @psychobunny wanting to pass on his youtube plugin, I've decided to release mine for anyone to use.
You can install it by typing npm install nodebb-plugin-youtube-lite
###Why Lite?###
This plugin lazyloads youtube videos on an as needed basis. It connects to youtubes API and pulls the thumbnail, and only loads the video when you click to view it, this plugin would be great for "youtube topics" where people post multiple videos.
###Screenshots###

###Issues###
Currently the video doesn't load when you first post, I'm working on it now though.
iPad users will need to click play twice on videos, as iOS blanket ignores the autoplay command. (Autoplay is enabled so that once the video is loaded, it plays)
Questions?