All For Baseball-10122021_720p.mp4 〈Working - MANUAL〉

: This is the most likely subject. The Red Sox famously adopted the remix of "Dancing on My Own" as their 2021 anthem. On October 11 and 12, 2021, the team was celebrating their ALDS victory over the Tampa Bay Rays, and clips of their clubhouse sing-alongs were widely circulated on MLB Network and social media during this window.

: "All For Baseball" was a recurring theme/tagline in Major League Baseball promotional content during that postseason, focusing on the grit and intensity of October baseball. All For Baseball-10122021_720p.mp4

The specific video file matches the file naming convention typically used for internal assets, broadcast b-roll, or promotional clips within Major League Baseball (MLB) or associated media organizations, dated October 12, 2021. : This is the most likely subject