I'm puzzled on this one. I cannot view a movie clip thumbnail IF and only IF it ends with the extension .mpeg.
I've dug through google and I am not alone. A lot of fixes were cured by a simply checking or unchecking a box in two important places. Mine were good. I'll break this down a bit.
. This using 8.1. win 7 never had this problem.
. File associations can be set to open with any player. no changes except the players icon.
. The players I have are media player (windows) Classic Media player and SMplayer + some other editing players.
. These movies are all stored on a data only drive from my old comp and everthing is there. (slave drive
. The movies play fine on any player with / open with dropdown.
Things I haven't tried since a google search.
. Update to the latest K-lite codecs (Movies play fine though?)
. Download some big ass bloated player that I don't think with fix a THUMNAIL issue! come on! LOL.
I don't know. Such a simple little problem. Ya I know its small but when you have a big folder it is so much easyier to spot a kid or cat face than trying to read the nonsense file I named it.

Have a great next year everone! :kookoo