My girlfriend has done some video work for college classes related to that field and has also done a music video for a band as well a couple minors things on the side; I know well how long it takes her to really get stuff right on the editing side, it's pretty hefty work. An interview will of course take shorter editing time since all you're doing is trying to eliminate dead time and mess-ups but if you're going to be serious about making quality stuff then you can't be getting exasperated at all with the amount of time it takes to get it right in post-production.
Chainchaser, you're asking for advice? I can't say I've actually watched your interviews but I did read the criticism of your first one so here's what I would say: Be prepared. That is by far the most important thing you can do to have a successful interview. You should definitely scrap the idea of letting people submit questions during your interview; it's great to let people do that but instead you should be having those things submitted to you well in advance of the actual interview so you can pick out the best ones, rephrase them into proper questions to ask, and make them part of your preparation. I like the ambition but only an experienced interviewer should be trying to do things on the fly if it can be avoided. Beyond that, make sure all your questions are down in the order you want to ask them, try to keep like questions together in a way that will make it almost a continuous conversation instead of a series of separate topics. Try to anticipate the type of things your subject might respond with so you can have potential follow-ups available. You may find it useful to prepare by sitting in front of the camera and asking some of your questions in the manner you would during the interview so you can review the tape and see if they're coming out as you intended. Most of all just keep it simple and don't try too hard, if you ask good questions and have a smooth dialogue then you'll probably have a good interview that people will enjoy watching. Good luck!