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Hi Arun,
I work along with William, allow me to assist you here.
The vpa parameter accepts constant value which indicates whether the ad starts through autoplay or click. Possible values are 'click' if the page waits for a user action or 'auto' if the video plays automatically. This parameter should be left unset if it is unknown.
However, I tested your test pages and I can confirm that I am seeing the same behavior as you. With this, allow me to share this to the rest of the team for further investigation. We will provide more information once we have the result of the investigation.
Regards,
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Hi Arun,
Sorry for the delay in response. This function exists to meet Media Ratings Council guidelines, and so I needed to reach out to our contact there to confirm the intended use of the VPA signal, and the intended value.
In the case of an autoplay video, you should not be sending VPA=click at all, as that is an incorrect signal. The ad playback was not triggered manually by a user, so this is not an accurate description of the behavior that occurred. While it is possible to manually set this for the first ad in a playlist or VMAP, doing so may put your interactions at risk of being considered spammy by various measurement providers.
In the case of VMAP and Ad Playlists, there is no way to set each ad in the playlist to VPA=click, specifically because no ads in the playlist are initiated by a user interaction, except possibly the initial pre-roll ad. The link you sent as an example, appears to be making individual ad requests for each ad served, so as to be able to set this value manually. Once again, this appears to be an incorrect application of the VPA parameter, and is not an implementation that we can offer support for.
Thanks,
Greg Schoppe
IMA SDK Team