I work for Vipdubs and have been running all the film transfer work for the past 8+ years or so. In my time here and working at film labs I'm sure I've handled over a million feet of film (and counting).
Of course we'd be glad to take your order. I take pride in doing the best job I can but I'll be honest and tell you we can't provide History Channel-type film transfer work at Vipdubs. We employ the tried & true method of simply capturing the projected image through a mirrored light transfer box. There are more detailed transfer methods available (at higher cost of course), mainly wherein the film is scanned one frame at a time. An internet seach will yield a few places down a Chicago that do this. Sorry, I'm not familiar enough with the work from any specific company to give a solid referral.
The 3 most important aspects of making a good film transfer are:
Make sure the image is focused as crisply and sharply as possible. Also, the video camera too. A camera's auto-focus feature is pretty much useless when transferring film so you need to make sure the camera itself is set to 'manual focus'. I find sections of film containing high contrast lines and detail are great spots to try to get the focus of the projector and camera dialed in the best.
Make sure the film is projected straight on, rather than at an angle. Sounds simple, and it is, but you'd be surprised how often I see home transfers where one side of the captured image is much larger than the other cuz folks had the projector/camera too far apart and/or off to the side. Fill as much of the video camera's viewfinder as possible (and use as little zoom to do so as possible) while also keeping as much of the original film's image in the frame as possible. Make sure your corners are lined up evenly.
To make a long story short, this is what will minimize 'flicker'. For 8mm film, generally, you want to set the camera shutter speed manually at it's lowest number of f.p.s. (usually 30 or 60 f.p.s) and then run light through the projector and adjust it's variable speed control knob (if it has one) until you see the least amount of flicker in your viewfinder. Keep in mind that projectors tend to run a little slower until they've had a chance to heat up a bit.
Please let me know if you have any questions.