Hi Yoxo and welcome to our community
The only thing that comes to mind is possibly clicking
Options > Recording Options... > Full Motion Recording tab
and checking to see how the
Record at higher full motion capture rate for smoother movie
option is set. However you find it (selected or DE-selected) I'd
try the opposite setting and seeing if the behavior changes. Other
than that, also changing the Working folder to perhaps C:\.
Hopefully one of these suggestions helps directly or helps
spawn a thought that does. Or possibly others will chime in with
other/better suggestions and insights.
Sincerely... Rick