Surely in recent yearss Panasonic has made/marketed/sold a DVD recorder that is for Brazilian standards for sale in Brazil?
I dont really know how specific PAL and NTSC standards are when it comes to AV recorder inputs. I thought when ever they sday you can record NTSC and PAL via line inputs it generally means all PAL and all NTSC. None of my manuals specifically say that they can not record certain types of PAL or certain types of NTSC.
I would be trying to find the Panasonic Brazil site (if you are indeed looking for a Panasonic) and downloading some manuals from there or even just contacting their customer support.
So going by your first post, Brazil is not migrating to digtial TV like many other countries and is staying with Analogue.
Here is info on PAL-M
NTSC being the "natural" choice for countries with monochrome standard M, the choice of a different colour system poses problems of incompatibility with available hardware and the need to develop new television sets and production hardware. Walter Bruch, inventor of PAL, explains Brazil's choice of PAL against these odds by an advertising campaign Telefunken and Philips carried out across South America in 1972, which included colour test broadcasts of popular shows (done with TV Globo) and technical demonstrations with executives of television stations.
PAL-M signals are identical to North American NTSC signals, except for the encoding of the colour carrier. Therefore PAL-M will display in monochrome with sound on an NTSC set and vice versa.
PAL-M is incompatible with 625-line based versions of PAL, because its frame rate, scan line, colour subcarrier and sound carrier specifications are different. It will therefore usually give a rolling and/or squashed monochrome picture with no sound on a native European PAL television, as do NTSC signals.
 PAL-M systems conversion issues
PAL-M being a standard unique to one country, the need of to convert it to/from other standards often arises.
Conversion to/from NTSC is easy, as only the colour carrier needs to be changed. Frame rate and scan lines can remain untouched.
Conversion to/from PAL/625 lines/25 frame/s and SECAM/625/25 signals involves changing the frame rates as well as the scan lines. This is achieved using complicated circuitry involving a digital frame store, the same method used for converting between NTSC and the 625/25 standards. The fact that the colour encoding of PAL-M and PAL/625/25 is the same does not help, as the entire signal goes through an A/D-D/A conversion process anyway.
 PAL 60
The PAL colour system (either baseband or with any RF system, with the normal 4.43 MHz subcarrier unlike PAL-M) can also be applied to an NTSC-like 525-line (480i) picture to form what is often known as "PAL-60" (sometimes "PAL-60/525" or "Pseudo PAL"). This non-standard signal is a cheap method used in European domestic VCRs and DVD players for playback of NTSC material on PAL televisions. It's not identical to PAL-M and incompatible with it, because the colour subcarrier is at a different frequency; it will therefore display in monochrome on PAL-M and NTSC television sets.The analog PAL-M is scheduled to be supplanted by a digital high-definition system named Sistema Brasileiro de Televisão Digital (SBTVD) by 2016.
After reading that i now dont think any DVD recorder outside Brazil will be capable of accepting PAL-M on its line inputs. It must be PAL 625 lines or NTSC..