Using Flex Video to render video ads in web banner ad slots (Beta)

Flex Video An Index feature that allows Index to render a video ad in a banner ad slot, using our own renderer. is a feature that allows Index Exchange (Index) to render a video ad in a banner ad slot The location on a publisher's website where an advertisement is served. Also known as inventory.. With Flex Video enabled, publishers with web banner supply can access Index's video demand, and allow Index to display a video ad in a banner ad slot using our own renderer. Flex Video is currently in Beta and is only available for the 300x250 ad size. Publishers must also pass the Global Placement Identifier (GPID) field in bid requests to Index. To enable Flex Video, contact your Index Representative.

How it works

	You send Index a banner ad request for a 300x250 ad size. The ad request contains a banner object within the impression object. The request must also include the Global Placement Identifier (GPID) in the `imp.ext.gpid` field. Note: Currently, the 300x600, 336x280, and 970x250 ad sizes for Flex Video are in alpha testing. For more information about these ad sizes, contact your Index Representative.
	When Flex Video is enabled, Index sends multi-format bid requests to eligible DSPs that include the following objects: The banner object that you originally sent in the request. The video object that Index adds to the request. The video object includes the `playbackmethod`, with a value of `6` and also includes the `plcmt`, with a value of `4`.
	Eligible DSPs bid on the banner or video impression opportunity and return their bid responses to Index.
	For Flex Video bids, Index adjusts the winning bid price to be an “Expected Value Bid” price before running an auction. This is done to account for potential billing discrepancies that could occur due to differences in impression counting methodologies between banner and video ad formats. For more information about how billing works for Flex Video, see Understanding Flex Video transactions.
	Index runs an auction to select a winning bid.
	The bid that wins the Index auction is sent to your ad server A platform that manages, stores, and delivers advertisements to a publisher's site..
	Your ad server runs a final auction to select the winning bid.
	If the winning bid is from Index and is a Flex Video ad that originated from a banner request, Index renders a video ad in the banner ad slot. You are paid the net bid The bid price after Index fee or, if applicable, Marketplace fees. price after fees, not the Expected Value Bid price.