The long string of characters ( d9af58f5... ) is likely a hash (like MD5 or SHA-1). This is often used by automated systems or private trackers to ensure file integrity. If you only have part 1, the video will likely cut off early or refuse to open.
Do you have the of the file, or are you seeing an error message when trying to open this specific one? d9af58f518bc7f075990d24a9b2461cc.part001.mkv
Once merged, you can play the resulting file using a versatile media player like or MPC-HC , which handle MKV containers much better than default system players. The long string of characters ( d9af58f5
Check your download folder for other files ending in .part002.mkv , .part003.mkv , and so on. All parts must be in the same folder for the reconstruction to work. 2. Join the files If you only have part 1, the video
: If they are simple binary splits, you can join them manually: