YouTube allows you to customize the format of ads being shown on your videos.

YouTube offers creators the ability to customize the format of ads displayed on their videos, allowing them to choose different types of ad placements, such as skippable ads, non-skippable ads, display ads, and bumper ads. This level of customization helps align the ad experience with the content and audience, making it more effective for both creators and advertisers. Additionally, creators can use these features to optimize their monetization strategies and enhance user experience on their channels.

Customization is indeed a central aspect of YouTube's advertising platform, facilitating a range of options depending on the creator's preferences and the nature of their content. Other options like only allowing customization for monetized channels or partners are more limiting and do not reflect the general availability of customization across the platform. Thus, the assertion that YouTube allows customization of ad formats is accurate.