For a campaign promoting a new musical with several native video ads, the correct Display & Video 360 line item type to use is a Display line item.
- YouTube & partners line item
- Video line item
- Mobile app install line item
- Display line item
The correct answer is: Display line item
Explanation: A Display line item in Display & Video 360 supports a wide variety of creative formats including image, HTML5 (which encompasses rich media), and notably, native ads for both display and video content. This allows for the assignment of standard, expandable, and native creative types such as native site (square and rectangle) and native video creatives, facilitating a comprehensive and engaging advertising strategy for the campaign.
Read more here: https://support.google.com/displayvideo/answer/2891312