Launchbox. A video error occurred: Windows Media Player encountered problem while playing the file

[ckp]

as i'm launching each of my mame games to test each one out (upgraded to 182 roms), i'm getting these random popup errors every so often:

"Launchbox. A video error occurred: Windows Media Player encountered problem while playing the file".

I just click Ok on the dialog (luckily because i don't use a cabinet). then if I click on another game and back on the same game, I will not get an error and the game video plays in the sidebar just fine. 

i am running LB 7.6 and I have never hit this before now.

[G0thamsHero]

Same here! Running LB 8.2

[G0thamsHero]

I found a solution already. Make sure that VLC is set as the default player for .webm file extensions. Hope this helps anyone with similar issues.