Banner ads are typically displayed outside of videos but within the website. These ads are paid per click or impression. There are several types:
Standard banners during video playback : These are displayed at the top of the screen when a video is playing.
Standard banners in search results: These are displayed in search results.
Standard mobile banners: These appear on the YouTube homepage and shareholder database in search results. They are only visible on mobile devices.
Masthead Formats
These ads are very similar to banner ads, except they're targeted at large companies because they're very expensive. They appear exclusively on the YouTube homepage.
YouTube Mobile Ads
These are YouTube advertising formats, designed specifically for mobile devices:
Roadblocks for mobile : These can be displayed on the YouTube homepage, in searches, and when browsing videos.
In-Stream Video Ads: These are ads that play automatically for 15 seconds before a video.
YouTube Mobile Brand Channels: These are channels exclusively for the mobile version of YouTube.