GRP video, also known as Gross Rating Point video, is a metric used in advertising to measure the reach and frequency of a video campaign. It takes into account the number of people who have been exposed to the video and how many times they have seen it. This allows advertisers to evaluate the effectiveness of their video ads and make informed decisions about their marketing strategies. GRP video is an essential tool for understanding the impact of video advertising and maximizing its potential to reach and engage target audiences.