In-Banner Video creatives is a creative type that displays a video on a standard display ad slot.
We recommend creating a linear video creative that contains two different media files to guarantee compatibility with all browsers. Use one WebM media file and one H.264 encoded video with AAC audio in a MP4-container.
Use ad type "In-banner video" when creating your ad. The size of the ad decides what ad slots it is eligible to be shown at, try to match the size and / or aspect ratio of the video creative to that of the ad. The video will be scaled to fit the ad container with with transparent bars filling any extra space.
Upload an image file to use as fallback if the ad is to be displayed in a browser that don´t support the html video tag. A compatibility chart is available here: http://caniuse.com/#feat=video
Assign a video creative to your ad under Misc Settings -> View/Edit Video Creatives.