Although the BS2 rips are more “finished” In terms of credits, eyecatchers, and next episode previews, due to regulations that NHK imposes on broadcasts, some frames are blended, slowed down, and blurred, to comply with their standards and practices on footage that could potentially lead to seizures.
This OAV was broadcasted between the episodes 488 and 489. I finally found "correct" English subs, I got them from YouTube after several days of research! I edited some typos, but just that, I'm not an native speaker. I think it remains errors, so I also put the .ass file if someone wants to correct it. RAW is coming!