巨大的3.0视频广告服务器示例?

There are alot of Vast 2.0 Players and a few 3.0 complaint players, but in the iab documentation for vast 3.0, there are not alot of direct definitions or examples on sendind ad data as an ad server. Are there any website with solid examples for linear, non-linear and companion ads?There are alot of Vast 2.0 Players and a few 3.