Yes - 'Replay Media Catcher' works fine thank you.
Better still, under one of the tabs, (Tools - converter) it will convert the file to WMA or any other recognised AVI standard, so the converted file will work in Powerpoint or any other media program.
Your 'mitts' are you hands. (More specifically - your fingers).
The term comes from the abbreviated form of mittens - or the fingerless mittens used during the Victorian era.
(Also popularised by fictional characters such a Dicken's Fagan and Lara Croft).
These mittens (rather than full gloves) would keep the hand warm, but still keep the dexterity of the fingers for delicate work such as counting money or engraving metals.
The phrase basically translates as 'keep your grubby fingers off my property' (which is also an allusion to theft).
"Listen to them. Children of the night. What music they make."