: Indicates the source was a high-definition stream or digital copy.
The specific tags in your query indicate a modern high-efficiency encode: HEVC (H.265)
: "High Efficiency Video Coding," a video compression standard (also known as H.265).
: Standing for High Efficiency Video Coding (also known as H.265), this is a compression standard that allows for high video quality at smaller file sizes.
for a digital video file, likely a movie or television episode.