Step 1: Is this a video you merely want comments on (in which case the quality of the video matters less) or a video you may want the world to see?
Step 2: Try to get lighting on your face (with the right color balance)
Step 3: Put the camera somewhat up front, so that the video audience will see you the way much of a live audience would & where you will be making eye contact with the camera.
Step 4: Set quality high. YouTube recommends as high quality as possible because their wizardry downgrades the quality as needed.
Step 5: Try to minimize extraneous sound. If possible, a microphone on you will help.