Step 1: Plot
You need to figure out what plot or idea your web show is going to be about.It could be interesting facts,current events,reviews of movies or people competing in competitive games.
Step 3: Practice
Practice lines with your cast members.Always be prepared and have good lighting.A movie maker will always improve your web show.
Step 4: My Web Show
Check out my web show on you tube,search Random Entertainment-Halloween special.Maybe you'll get some ideas from my web show.