I recorded Minecraft, you also hear the desktop sound in the recording, but if I want to cut the video with hitfilm, you will not hear the desktop sound anymore. Usually you hear him when I cut with hitfilm. What could that be?
Try out as an alternative to Hitfilm OpenShot: https://www.openshot.org/de/ Free Software, has more features like hit movie. Supports resolutions up to 4k.
But that has no watermarks or?
This has no watermarks because it is free software that costs nothing. You may use them privately or commercially without paying royalties.