[bromix]

Hi bromix,
I'm writing a plugin that mimics youtube collections (although it will be a little more advanced)
The basic functionality will let you take a bunch of playlists/channels and merge them into one list of videos.
I will also add a few more complex operations/filters you could then use.

Anyway,
I was wondering if I could somehow use your plugin to get all the info I need (playlists, channel uploads, video info,etc)?
Or will it be better to just use Youtube's API directly and write everything from scratch?

I don't think the addon would help, because the framework inside is returning already completed items for KODI. What you need is the raw API. Especially if you want to merge the result of more then one Playlist. But keep in mind that the request via the API is limited. Only 50 IDs in batch for videos, Playlist and channels and a quota per day for one API-Key. The current addon is already at 50% per day and counting.

I would suggest write your own wrapper for the collection and Playlist merging with your key and for the playback you can call this addon.