Sankaku Channel/

I understand my mistake in what refers to the animated tag.

but a screen capture is a still image not a video/webm

Original tag description: A programmatically captured image of a computer's screen, also called a screenshot and a screencap. A standard feature in many computer operating systems and media players. Often used to capture still images from video games and video files.

and your version: This tag indicates that the post is a still image or an animated sequence (usually gif or webm), extracted from an anime. In general, it does not apply to caps from eroge or game cg.

better admins or moderators decide this