In order for your content to be shown in Google News you have to be approved via the
Google News Publisher Center and verify ownership of your news site or channel. Simply submit your channel in the link below:
Code:
https://support.google.com/news/publisher/contact/news_youtube/
If it's good content then your content will be approved and it has to be strictly a news channel (no exceptions), it must be original (content, music, images etc.), your videos must include relevant descriptions, useful titles and basic information about your website or organization.
Once you're approved then your backlinks will have the effect that you're expecting, that's if they're good quality backlinks though. But you need to be approved by the google news team first before your content can show up in google news search results.
Sometimes your content can rank in google news just out of the blue, so this is not the only way, it's just the way google recommends and it's a long term strategy unlike a fluke.