Microblogging platform Twitter has introduced pre-roll ads to Periscope as it seeks to monetise its livestreaming video service and generate more much needed advertising revenue – after falling short of Wall Street revenue estimates last quarter.

Ads, powered by Twitter’s Amplify video ad product, will work in a similar fashion to how ads already work in Twitter video. Certain Periscope videos – both live and replayed – will begin to display short ads prior to the user being able to view the actual video content that they came for.

“Ads on Periscope videos are a new way to use live and on-demand video to reach audiences at the most relevant moments,” said Mike Folgner, group project manager at Periscope, in a blog post.

“For creators and publishers that use Periscope to go live on Twitter every day, these pre-roll ads present a new way to monetise their video content. For marketers, they have a new source of brand-safe video advertising beyond what was previously available, including ads during live streaming programs from select premium publishers, Promoted Tweets with Periscope video and custom Amplify campaigns with premium content creators.”

Periscope video ads are currently only available to select advertisers through custom Amplify packages but Twitter says it will roll out the pre-rolls to advertisers ‘more broadly in the coming months’.