If your player doesn't support the specific compression of the MP4, you may need a codec pack like K-Lite Codec Pack .
A lightweight, open-source player for Windows. Babhi_E01mp4
To share the file, consider uploading it to Google Drive or Dropbox . If your player doesn't support the specific compression
If the file is incomplete or corrupted, it may not play. Try re-downloading or re-transferring the file. Babhi_E01mp4