A good amount of shows have canonical versions of their episodes uploaded on YouTube.

It'd be useful if there was a way to "link" episodes with those specific YouTube videos.

This unique video ID (the part after /watch?v=) would ideally be exposed through the backend for API clients. As for the website, instead of embedding the video, a simple link would be fine since I don't think you guys are interested in turning Trakt into a viewing platform.

The reason I'm interested in this is, it's always been a hassle to keep track of your subscriptions and the content you care about on YouTube. It's a big mess. And with the introduction of YouTube original shows, serialized content is only going to grow from here. This change will enable devs to create browser extensions that implement Trakt directly onto the YouTube interface, allowing people to scrobble and track a lot more shows automatically. It will also potentially bring thousands more users to Trakt.

The implementation would be as straightforward as adding a database field for the YouTube video ID. Of course you do have to update the interface and the API endpoints to support the new field.

Some example links:
https://trakt.tv/shows/h3h3productions/seasons/2016/episodes/11 -> https://www.youtube.com/watch?v=RMICTAl4LCg
https://trakt.tv/shows/open-haus/seasons/2016/episodes/32 -> https://www.youtube.com/watch?v=xmHklWqagKc
https://trakt.tv/shows/on-the-spot-2014/seasons/6/episodes/6 -> https://www.youtube.com/watch?v=-1NVV7ufTNE