My gut feeling is that this could definitely augment, but not supplant, shadowing right here at home. I think you are correct in wondering how it may be perceived - specifically your concerns that it could be seen as not relevant to practicing medicine in the US.
Remember, part of why Adcoms like to see shadowing is so that they understand you have at least been exposed (in at least one form or another) to what the actual final day-to-day life of a physician may look like. That is, that you are making an informed decision to go to medical school.
Furthermore, I think you can spin this into a positive for interviewing/essays/etc. This might be a unique opportunity to observe firsthand how healthcare is delivered elsewhere. Being able to speak intelligently about this may be a huge benefit when applying (and certainly a benefit for your future career).
To this end, you should try and develop a good grasp of the disparities in healthcare before, during, and after your shadowing. To start, I might suggest you pick up a copy of T.R. Reid's The Healing of America. It is a good narrative comparing and contrasting healthcare practice models in several industrialized countries from the patients' perspectives.
Best of luck.