Taking a look at the UI products

[Balaji.V]

Basically what I think happens is that Video player used by VOD platform makes request to the ad server and relevant format of AD is served. One of the providers I dicussed with support VAST protocol for ads. So I believe any of your Plaform need to look into and implement.

It is a Video Ad Network/ Video Ad Platform that provides an unique opportunity to run ads alongside video content and enables advertisers to connect their message to a massive, engaged audience. Its delivers the Ads based on the targeting Models set by the Advertisers / agencies.