This indicates the film is not an official Hindi dub but rather has an unofficial Hindi voice track layered over the original Tamil audio. Dual Audio:
Since Cobra was originally filmed in Tamil, early unofficial releases often use a "voice over" dub where a single narrator or a small team translates the dialogue over the original audio, rather than a professional studio-quality Hindi dub. Cobra 2022 HDCAM Hindi -Voice Over- Dual Audio ...