Well, it took a long time but it finally worked! Here's "doing the housework". The quality isn't great and I've forgotten a couple of question marks. Also, note how water conscious I am when doing the dishes (no water needed!). But there's no way I'm putting myself through this again, so it will have to do.
I had trouble uploading my video and checked the size, format etc. In the end, the problem was my internet connection which had dropped off . So I didn't have to use Zamzar after all. But I'll keep that in mind for next time. It might upload faster as a mpg file.