OK, not one I’ve heard of - sadly not supported by OpenWRT.
That will be a PPTP client.
The idea is to set up a VPN server on your UK internet, then connect in from France.
The advantage is that iPlayer (or whatever/whoever) sees your normal log-in, from your normal IP address. No-one else is using that IP address and if the BBC look it up they will just see that it it belongs to a regular, if small, UK ISP - not a VPN provider.
The result is that it isn’t going to be blocked.
You don’t have to read the rest of the post, it explains a bit of network stuff. Probably a bit rambly, for which I apologise.
The slight catch is that most ISPs do not make it easy to run servers. For the most part this is not exactly deliberate but as a result of a bit of technology called NAT.
NAT stands for “Network Address Translation” and it is a solution to the fact that IP version 4 (IPv4) has only 2^32 (or just over 4 billion) addresses - this isn’t enough on a planet with 8 billion people, even where barely half have access to the Internet because there are more devices than people.
One solution to this is “IPv6” (version 6, don’t ask what happened to version 5) which is a separate conversation.
The other solution is NAT - this means your router gets a “real” IP address and however many devices you have in your house get “private” IP addresses. They can connect out to the Internet - when they do so the router makes it look as though the connection is coming from it, then remembers where to send the data when it comes back.
It’s a bit like a company with its own small telephone system and numbered extensions which can call each other, and get an external line when they need.
However, an incoming call can only go to the company telephone number, there’s no way to directly reach an extension - in the same way your router does not automatically know what to do with an incoming connection.
However you can tell it - this is a process called “port mapping” or “port forwarding” - your cnPilot R 190 can do that if you want to use the RPi VPN setup described above but you can save a separate bit of kit in the network if you run the VPN server on the router itself.
The other problem with running your own server is that most ISPs don’t promise that the IP address that they give to your router will stay the same. That’s all that a “static” address is, one which doesn’t change, but not all ISPs will give you one, or they will charge you for it.
Having an IP address which can change is much the same as having a phone number which changes once a week - it can be difficult to know what number to call when “dialling in” - however there are services where each time your router is given a new IP address it can update a DNS server online so that you can use a fixed name, rather than IP address to know how to reach your server.
Given that you don’t have a router which can have OpenWRT installed easily the RPi approach should be the easiest because a new RPi should be cheaper than a new router, however the problem is that the chip shortage is making them harder to find than hen’s teeth at the moment - certainly for their RRP, RPi 4’s are going at about £150 on eBay, assuming you can find them in the first place.
If you can get hold of a router which can have OpenWRT installed you can run the VPN server on the router itself, the advantage being, as I said, one less piece of kit. The disadvantage is you have to buy a new router though that’s maybe not that big a disadvantage if you need to buy new kit in the form of an RPi anyway.
I’m pretty sure OpenWRT has an OpenVPN server available but, as I said, for this I prefer PPTP because it is much more lightweight, and tends to be supported by commercial routers such as the Asus you have in France without modification.