Hello. You might not have to find someone in Brazil for that. I can just open a browser window in a server in Brazil and send screenshots (much faster) or take a video for you. Or instead, you can connect with remote desktop yourself for a faster video-like solution and inspect your web site thoroughly as you want.
I'm guessing that your web site has some geolocation features to detect visitors from Brazil and you want to test that, these servers are physically in Brazil so their IP addresses will belong to Brazilian hosting companies and their geolocations will check around Sao Paulo. However I'm afraid to say that my price will be a little higher than your €8 offer but we might do some extra business in future since I'm a developer.
My offer is not concerning VPN's btw, they're actual computers with real private IP's. Contact me with a message for us to settle things...