Options (settings) (category)

has_custom_header()

Checks if an image is set for the theme header, or if a video is set and available for display on the current request page.

is_header_video_active()

Defines whether video can be displayed in the “custom‑header” area on the current page. Conditional tag.

the_custom_header_markup()

Outputs the HTML code for the site header specified in the customizer — this can be an image or a video.

the_header_video_url()

Displays header video URL specified in theme Customizer (theme settings).