No Internal Audio While Screen Recording

[Sankar]

So um i was gonna start a yt channel based on Pokemon games like lets play ,so when i started recording the video is quality is clear and good and my screen recorder supports internal audio too but i cant record internal audio in drastic like i almost recorded 15 min of gameplay and it turned out that drastic doesnt allow internal audio recording .when i use audio source as microphone on my recorder it records internal audio too, so the problem is i wanna record video first and do a voice over it would be good if drastic can allow internal audio recording that would be the best update to so many creators out there