What video and audio does Walkman support?

The original Walkman was marketed in 1979 as the Walkman in Japan, the Soundabout in many other countries including the US, Freestyle in Sweden and the Stowaway in the UK. Advertising, despite all the foreign languages, still attracted thousands of buyers in the US specifically. It is a Sony brand tradename originally used for portable audio cassette players.

What can you do with Walkman:
Playing Music
Listening to FM Radio
Watching Videos
Playing a Podcast
Viewing Photos
Playing songs using "SensMe™ Channels"
Setting the Timer

Specifications:

Video format refers to the method used when importing video and audio data to a computer and saving it as a video file.

WMV: WMV (Windows Media Video) is a video compression format developed by Microsoft Corporation. It was built upon MPEG-4, achieves a high compression rate, and supports copy control by DRM.

Audio format refers to the method used to import audio data from the Internet or audio CDs to a computer, to save as an audio file.
Common formats include MP3 and WMA, etc.

MP3: MP3 (MPEG-1 Audio Layer3) is a common audio compression technology developed by the MPEG working group of the ISO (International Organization for Standardization).
MP3 can compress audio files to about 1/10 the size of standard CD audio files.

WMA: WMA (Windows Media Audio) is a common audio compression technology developed by Microsoft Corporation. The WMA format produces the same sound quality as that of the MP3 format with a smaller file size.

AAC: AAC (Advanced Audio Coding) is a common audio compression technology developed by the MPEG working group of the ISO (International Organization for Standardization). The AAC format produces the same sound quality as that of the MP3 format, with a smaller file size.

Linear PCM: Linear PCM is an audio recording format without digital compression. You can achieve CD sound quality by recording with this format.

Related article:
AVCHD Video Converter for Mac can convert .mts or .m2ts file to WMV on mac so you can watch your video, and MOD Video Converter for Macalso can help to convert mod file to wmv on mac.