Video ads are still in the market, boosting revenue when used correctly. These ads offer higher engagement and better payoff than other ad formats. Video ad networks are platforms which connect video advertisers with publishers having advertising spaces across various websites. A video network buys inventory space in bulk. It gets more favourable rates due to their size, so when you use them, they connect you with ad space at various locations for a lot less money as compared to individual traders. Instream video ads are effective, as it delivers ads when the user clicks the play button to watch the video content. Regardless of the ad placement, ads are being viewed by the user along with the actual video content. Outstream video ads managed to garner higher visible duration so perform better. Video ad networks are required as you cannot get advertisers regularly throughout the year. Building the technology to run, report, optimize video ad campaigns is also quite challenging. Additionally, video ad networks help to fight against the fraudsters and spoofers. An effective video network should have better targeting, support all devices and provide robust analytics. Here are detailed reviews of popular Video ad networks for publishers and advertisers.