They might be trying to play the file on their PC or another device. So, I can suggest media players like VLC or MPC-HC that support various codecs. Also, check the file's integrity and format. Maybe verify the source if it's from a torrent, but again, legality is a concern.
I should also mention that terms like "pcok" might be a mistake or a niche term. Asking for confirmation would be good. Overall, the focus is on guiding them safely and legally while addressing their technical questions if possible.
If you need further technical help with media playback or codecs, let me know! Always prioritize legal and ethical sources for content consumption.