If you don't want to run ads in your videos, display ads are your best bet. AdvertisingDisplays on the right side of the video and above the list of video suggestions. For active users, this ad may appear under the player. This form of advertising is only available on the desktop side.
Display ads are not the most prominent type of advertising on YouTube. If users are only interested in watching videos they're currently watching, they can bypass your ads altogether.
But if you want to increase conversion rates, this is also a good choice.When people choose to click on your display ad, it means they're already interested and may be easier to convert.