: This is the internal release code or date format. In this case, "121314" likely refers to the release date of December 13, 2014, and "01" indicates it was the first release of that day. Azusa Sasaki (佐々木あずさ) : This is the name of the actress featured in the video. : The digital file extension for the video.

"Video featuring Azusa Sasaki, recorded on December 14, 2010."

: If you're looking to edit the file:

10musume 121314 01 Azusa Sasaki --.mp4 31 hot

: This is the internal release code or date format. In this case, "121314" likely refers to the release date of December 13, 2014, and "01" indicates it was the first release of that day. Azusa Sasaki (佐々木あずさ) : This is the name of the actress featured in the video. : The digital file extension for the video.

"Video featuring Azusa Sasaki, recorded on December 14, 2010."

: If you're looking to edit the file:

10musume 121314 01 Azusa Sasaki --.mp4 31 __hot__

10musume 121314 01 Azusa Sasaki --.mp4 31 hot