: This likely refers to video resolution. 720p is a high-definition (HD) video resolution standard with a resolution of 1280x720 pixels. "High Quality" further suggests that the video or content in question is of good visual fidelity.
In Japanese culture, the term "Keiko" (稽古) has significant meanings beyond a personal name: Martial Arts Practice 1000giri 130614 keiko 720 high quality
A high-quality 720p file typically ranges from 1.5 GB to 4 GB depending on the length and bitrate. Ensure you have adequate disk space if you are archiving multiple volumes from a series. : This likely refers to video resolution