Technically it's CHDK, not ML, so you'd have to bug him over there.
That said they've stonewalled on development; appears to be a dead subject; different propcase set than standard Powershots thus CHDK doesn't give you control over codec (or any other video) options as it's making bad function/mismatched/unmatched calls against the M3. They'd have to rewrite their existing base code to accommodate is what I gather, feel free to correct me if I'm wrong in my interpretation.
That said they've stonewalled on development; appears to be a dead subject; different propcase set than standard Powershots thus CHDK doesn't give you control over codec (or any other video) options as it's making bad function/mismatched/unmatched calls against the M3. They'd have to rewrite their existing base code to accommodate is what I gather, feel free to correct me if I'm wrong in my interpretation.