Curious, please help and educate me

i wonder why the videos that were uploaded here has no sounds when you played them.Why? I never done video but i'm going to do soon. Thanks for the help.

Artists deleted sound track only. For good reason, customer don't want extra sound, talking, music etc.

so, just remove the sound when you edit?

Ja.

If you can do good sound recording, not the stuff you capture on the camera, and the sound can add to the recording, say a siren off an ambulance or the sound of an avalanche roaring, then it's good to add it, otherwise delete it.