[Feature Request] YouTube/Twitch Import Subscriptions/Follows

I'd love to have the ability to not just show certain channels but a subscription feed from all the subs (I know I could create it manually, but that would require me to update it whenever I sub/unsub). Same goes for Twitch. Best if one could filter by "unwatched" for YouTube.
Probably requires an API key, but that is fine.

For Twitch I'd love to see who of the people I follow is live. Right now I'd have to add each channel individually.
Possibly one could add content filters (White/Blacklist) like Category, Tags or whatever works best to filter the feed. I am fine with just seeing the whole feed, but possibly people might only want to see some feed.

For quick and dirty workaround I might just create a js script that extracts these things and returns a yaml block I can paste, but that is still a manual update solution.