If you download good lock from the Galaxy store it has a nice shot feature which records your screen along with audio. Audio is disabled by default and you would have to enable it
If you want to screen record using game tools
• The app would be installed
• Add the app as a game in Game launcher
Incase the app is installed use Mobizen
• Use the global one one, Not the samsung one.
Edit: i messed up some words
Game tools can only record if the app is a game or you added the game to it from game launcher Game tools can record in internal sound without external
Mobizen can record any app without cutting off but it doesn't have internal sound.
DU record works okay and if you do the free trial its excellent. Just be sure to cancel if dont wanna keep full version.
It records every thing on your screen as then can edit so its shorter if you want