OpenSlate - part of DoubleVerify | 3,414 followers on LinkedIn. The leading provider of video content ratings across the world’s largest digital platforms. | OpenSlate's independent, industry-standard metrics foster a healthy online video ecosystem and support high-quality content. Our content ratings system ingests and analyzes more than 500 million videos every day, providing advertisers with a third-party assessment of the content that they support with their ad dollars. We work with hundreds of the largest online advertisers and all of the global ad holding companies.