pixels. The "p" stands for , meaning the lines of the image are drawn sequentially for a smoother appearance than interlaced video.
: This numerical string is typically an internal database ID. In many systems, like those used by stock footage sites or social media CDNs, this number helps the server locate the exact piece of content among millions of others. 12274607-720p.mp4
: This indicates the video is in High Definition (HD) , specifically pixels