If your Google ads aren't performing as well as they used to then YouTube ads is a great solution to improving, cost per click, CTR, and overall impressions. Most ads managers haven't run YouTube ads before and you shouldn't ask someone to manage these if they don't have any experience. The other thing I can do for you if you haven't done this yet is, configure your conversion tags. No matter what type of Google ad you are running, setting up conversion tags always improves your performance by 4X.