When you set the filename to record .ogv, the program doesn't ask if you want to overwrite the .ogv file (as you sure?). It just overwrites it when you press record. Need to at least have a dialog asking if you're sure y ou want to overwrite.
Is it too much to ask for a standard dialog asking if you're sure you want to overwrite the file? Yes, no, cancel. Every modern desktop application has this.
There is an option in preferences ("advanced") for this.