: Use MediaInfo to view the "hidden" metadata. It will tell you the exact codec used (e.g., ProRes, H.264, or an obsolete Cinepak codec).
: This is the most "solid" player for obscure .mov files. If VLC cannot open it, the file may be corrupted or encrypted. ww11z s__per-quicktime.mov
: If you received this as an unsolicited attachment, do not open it . : Use MediaInfo to view the "hidden" metadata
If you have this file and cannot play it, use these tools to identify its contents: ww11z s__per-quicktime.mov