Hey Simon!
Nice to meet you!
What I’d suggest doing is getting a decent computer (doesn’t have to be too great, but decent) and put a video capture card into it (I like BlackMagic Designs but my favorite is AJA but it’s much more expensive) and use a capture software to capture it and you should just have to set the capture settings you want and then you’re done…
Once you finish the event, you hit stop on this other computer and your video’s done. you might want to trim the beginning and end, but that’d be it…
Check a software called OBS (Open Broadcaster) it specializes in streaming video, but it does do capture too, not sure on it’s settings though, if it’ll give you the settings you want. Can also check into flash video encoder and microsoft’s free media encoder too (don’t remember the names of em, but you should be able to google em)…
That’s what I’d do anyway… using a computer like this, also gives you another computer you can use for other things in other situations… or you can even use another computer you have and use for other things but don’t use during this event and there ya go, just need to purchase a capture card then ?
Good luck!