yes, there are so many ad networks which support video ads like..
Altitude Digital partners
I think, TechAdbox also supports video ads, not sure..
TechAdBox, United States-based company founded in 2015, has been fastest growing and silently moving to be one of the largest ad network, serving more than 500 million geo-targeted ad views in a month using TechAdBox ad-serving technology. TechAdBox provides online advertising services to both advertisers and publishers.