The latest WhatsApp beta allows you to remove audio when sharing videos: to do that, tap the mute icon before pressing the Send button.
The latest WhatsApp Beta (version 2.20.13) finally brings the long awaited dark mode. To activate download here, install and head to the three dots in the upper right corner. Next select Settings > Chats > Theme > Dark. FYI, going from stable to beta doesn't affect your chats or settings in anyway.