That 4GB file on Isaimini isn't 4K. It is usually a shaky cam or a heavily compressed rip. For a visually fun film like Arunachalam (especially the temple and fight sequences), the experience is ruined by pixelation and tinny audio.
Swept the Tamil Nadu State Film Awards , winning Best Film. Arunachalam Movie Isaimini
Arunachalam (1997) — starring Rajinikanth, directed by Sundar C., music by Deva — remains a beloved masala entertainer in Tamil cinema. “Isaimini” refers to music and soundtrack circulation sites/platforms known for sharing film audio and sometimes full movies; discussing it requires focus on appreciation, legal considerations, and practical tips for enjoying the film and its music responsibly. That 4GB file on Isaimini isn't 4K