-az-animex- Tate No Yuusha No Nariagari - 08 -b... Site

The string -Az-Animex- suggests it’s from a fansub or encode group (possibly Az-Animex, though not one of the most widely known groups). The -B... likely indicates the file is part of a batch (e.g., -B for “Batch”) or a split part, or it’s cut off from -BD (Blu-ray Disc) or similar.

It looks like you’ve shared a partial filename from a fan release of The Rising of the Shield Hero (Tate no Yuusha no Nariagari), specifically episode 08. -Az-Animex- Tate no Yuusha no Nariagari - 08 -B...