Many thanks for your kind reply! Sorry, I don't know if it was nightly image, or not. But I have just burned an image on my EMMC using Rufus with the corresponding image from the link on the first page of this thread.
That should be easy with [tt]PROJECT=Allwinner ARCH=arm DEVICE=H3 scripts/create_addon pvr.iptvsimple[/tt
Unfortunately I am not that skilled at all, so I don't know how should I run that. Perhaps there is any guide for noobs?))) Or, I have to wait until everything would be done to get the PVR...