In YouTube’s latest attempt to pull advertisers away from the TV, the Google-owned company will offer marketers some time guarantees; they’ve pledged to air ads across its channels until a certain number of target viewers see the ads. The company will also reserve ad space for companies that purchase time in advance for the best performing 5% of shows on its channels. One could view the move as a reaction to Yahoo’s move into the online-streaming community, as well as a reaction to CEO Marissa Mayer’s statement that Yahoo is very advertiser friendly. The new ad scheme will go into effect in the coming months, and is a big concession to advertisers for a medium that, at least in the past, was slightly averse to advertisers coming into its fold.