@Linkat,
First I must admit that I abandoned iOS after only a few months. As the saying goes, "they just work", but they also just don't operate how I want them to operate. But enough of that – the bottom line is I'm not much help in specific iOS software and such (are Mac computers able to access icloud?). I don't know about the Apple store. If you're not buying anything, they're probably not going to be too keen on helping.
I would say that getting all of the vids in the same location is a good starting point, probably on the computer
and the iPad. From there I just search for software that's as barebones as possible and is made specifically for the task desired (to keep it simple). There is a lot of
stuff out there, depending on how much you may want to work for it, and this one sounds pretty important so it's probably worth a bit of money and effort for quality results