In idol culture, a "pull" often refers to the luck-of-the-draw when opening physical media or trading card packs. Fans are often looking for a specific "rare" shot or a limited-edition insert. The preview likely showcases a highly sought-after sequence or a "rare" appearance by a rising star in the idol world.
Because the core subject of the keyword targets the industry, it connects directly to Japan's deeply rooted subculture of heavily managed performers.
The theme is shintaiso , or New Gymnastics. This is a specific and well-known genre within the junior idol industry. These DVDs often feature young idols performing rhythmic gymnastic routines in leotards or similar athletic attire. The athletic and acrobatic nature of the content is a key part of its appeal.
So, the search term "Girlx Jpidols" would have been used by someone seeking female idol content on a site or database connected to the Japanese idol ecosystem.