Add youtube channels to the youtube integration

[mdolr]

Currently the youtube integration only works for videos since #8 .
Add the preview of channels in js/templates/youtube.js

You should make it so that you find a way to consistantly identify channel links and return the type of a link being channel in the checkLinkType function

You should inject the HTML elements needed to preview a channel when the link is hovered in the bindToNode function (please do not use innerHTML and prefer DOM manipulation for firefox support)

[egfanboy]

I investigated this for a little bit.

The embedded channel will only show some playlist for a channel.

Also you would need to make an API call with the chanelId to get the channel username to embed the channel

[mdolr]

I looked into that, maybe we could use the page's metadata as it provides the channel description, the channel icon and the channel's name.

[lavina98]

Hi
This API can be consumed for the channel name, image, description & subcribers.
https://developers.google.com/youtube/v3/docs/channels/list?apix_params=%7B%22part%22%3A%22statistics%22%2C%22id%22%3A%22UCGMcVCg3tHKmy9oaUCIw8xw%22%7D#usage
The request parameters include:
part - brandingSettings, statistics
id- (channel id)
You need authorization & API key

[mdolr]

Hello @lavina98 thanks for your suggestion, I think we've already discussed the use of the youtube API in #13 but it seem like a pretty bad solution as we would need to share the API Key, or have our own API, and we would have troubles scaling with the ratelimits.

[hisakiyo]

#45