If you're spending most of your time doing knife-to-knife (a common complaint about FMA), arguably you're not training for the high-percentage situations.
A couple points. First, with FMA there is a reason why a lot of instructors stick with knife to knife. First off, one of the basic premises is: HAVE KNIFE. Sounds rhetorical but a lot of it is to get you into a position to get your opponents knife. OR buys you time to draw your own knife. A lot of people think that with it comes down to it you'll be focusing on the knife (after all thats what is going to cut you). Main point is to notice what sides the blade is coming at you from.
"Flow" (I know there are other terms for it in other Martial Arts) is unfocusing, relying on muscle memory. Acting and reacting to body and weapon position. Kind of like how a lot of people go into automatic mode when they drive (Do you remember what the last pedistrian was wearing on your drive home? Probably not, but you steered your vehicle in a manner where they were not in any danger.). Response to a knife charge: Step (outward, inward), pass/disarm/control, strike. Where exactly, I can't tell you depends on the positions of your opponent. This is why the development and attainment of "flow" is desirable. Its kind of a constant Observe and Orient state. Decide and Act occur instantaneously.
Secondly, knife-work and stick work translate both ways. The movements are the same, but the ranges and targets differ slightly. I feel confident enough to pick up almost any weapon (with the exception of full sized axes, and heavy bastard/claymore style swords) To a search on traditional filippino blades, they vary vastly. The last group I trained with emphisized(sp?) improvized weapons. "You are the weapon, everything else is a tool."
Lastly, a lot of instructors tend to stick to knife work because of injuries. Over the years I have broken fingers, knuckles and had hairline fractures in both wrists from bungled drills, and sparring. Working both with and without padded gloves and sticks. Once you sustain an injury like that, the best you can do is work through your uninjured sides strikes. Generally if its your first injury in FMA, especially if it was someone elses fault it'll deter you from sticking with the program. Generally even with aluminum trainers the worst off you get are some deep bruises. Which is very common in ANY martial art.
I personally don't think that you can attain proper edged training from a video tape. It takes proper instruction, and
a lot of practice and sparring.