.asf

Advanced Systems Format

Handled by macOS itself

Format facts

MIME type: video/x-ms-asf
Apple UTI: com.microsoft.asf
Stock Quick Look: no stock preview
Planned approach (census): native-sufficient
Icon hint: plays
Prevalence: common

Renderer note (from the census)

macOS plays ASF natively

Gotchas: WMV/WMA container