The reason most organizations seek out YouTube ads is because their original ads aren't performing as well as they used to.
Another big mistake that gets made when companies start running ads is that their Ad account wasn't set up under their name so as soon as they stop paying their ad agency to manage their ads all their campaign history disappears with the relationship they had with the ad agency.
Running a successful Google Ads account now requires more than one ads manager. There are simply to many ad campaigns for one person to specialize in all of them. Video campaigns, or YouTube Ad campaigns are vastly different than PPC or display campaigns.
Hiring someone to create video ads for your organization requires that the person making the video understand the YouTube ads placements environment. Because, if you hire one person to make the videos and a different person to run the ads the videos won't perform well and nobody will know why the campaign's aren't working.