Fun story. Right scope for the length of the short.
180 degree rule:
put your finger on the face of one of the actors on your screen... as they're talking they should have the conversation across the centerline of the screen as if they are facing one another and talking (which they should be in this case). In this short, the shots of the sales man require the camera to be on the right side o the door facing out - so when you move outside the door to face inward for the other actor, draw an imaginary line between your actors and keep the camera on one side or the other... don't break this rule until it is second nature and you know WHY you're breaking it.
audio:
- on camera microphones sound like crap, the story was compelling enough and the situation funny enough to allow me to overlook it for the most part.
- Watch out when editing for "Ping Pong" dialog (cuts from one angle to another exactly on the dialog breaks), they can be a bit jarring.
- Tighten up the cuts a little but too, there's too much gap between lines. You can almost entirely remove the gaps when dealing with most comedy dialog, using them then as points of breath for the audience to process the previous exchange, then right as they would "get it", move along.
- For each clip in your timeline, make sure you're cutting into something... if the clip starts with dead space, your audience will start to drift. They want you to cut, and they want instant gratification for the reason they want the cut. Either they want to know how the other person is reacting, or they want to see how the other person is delivering a line. Try to answer the audiences "want" immediately with each cut.
- Record some "Room Tone" (blank audio with no one moving)... you can place this under cuts to smooth them out a bit... 30-60s should be enough.
lighting:
- use some. While we are accustomed to seeing the world with regular lighting, the camera is really picky about how it deals with light value differences.
- Your footage was all a bit yellow and dark. Some color correction would serve this one well. First, use a color correction plugin to push your footage away from yellow (toward blue/cyan). Then, use a levels adjustment to bring the brightest bits up to white and the darkest to black (100% and 0% respectively, use meters and numbers to do this).
You got the important bit though, the story is really kinda good, and the bit at the end really funny. You HAVE the part that can't be taught, the story teller mentality, now just learn the technical bits.