Inspector.avinash.s01e01.720pweb-dl.aac.5.1.esu... !exclusive! -

This is a truncated identifier. It likely stands for (External Subtitles) or the release group name (e.g., "ESuRg"). Alternatively, it could indicate E-Spanish or English Subtitles . Given the truncation, the full release might read ESubs (English Subtitles) or ESuRg (a known release group).