While you mentioned "Tamilyogi" (a known third-party site), you can stream the film through official channels including: Sun NXT (Official HD Stream) Hungama Play or MX Player
"Arunachalam" is a 1999 Tamil-language comedy film directed by V. Sekhar. The movie stars Ravichandran in the lead role, with Maheswari, Sridevi, and K. S. Ravikumar in supporting roles. Arunachalam Tamil Movie Tamilyogi