Facebook: Access the data in the Meta Business Suite, including: video performance, benchmarking, audience, loyalty, and retention. Learn more here.
YouTube: Log in to your account, click on the icon for your account in the upper right hand corner, and choose YouTube Studio from the dropdown menu. Use the menu on the left to access the data: To see data at the channel level, choose Analytics; to view data for an individual video, choose Content, check the box next to the video you want to see the data for, then click Analytics. There are more YouTube resources here (Data access help is under “Create & grow your channel.”)