[generic] hook up the doodstream extractor to look for embeds

[sxvghd]

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Description of your pull request and other information

Enable the generic extractor to utilise the doodstream extractor for embed url extraction.

[blackjack4494]

Hm..

[blackjack4494]

@sxvghd do you have any sample links?

[sxvghd]

This will do.