Most modern "300MB MKV" files use H.265 (High Efficiency Video Coding) . H.265 can reduce file size by an additional 50% compared to H.264 at the same visual quality.

Example:

If you’re looking for South Indian films (Tamil, Telugu, Malayalam, Kannada) with dual audio (e.g., original language + Hindi or English), use legal streaming platforms. Many offer high-quality video and audio, often with subtitles or dubbed versions.

Popular platforms with South Indian dual audio content:

Tips for finding dual audio legally:

Why does the 300MB MKV rule the underground?