Amazon Prime Video, where "Upload" is exclusively available, does stream in high-quality formats. However, it's not straightforward to choose the encoding format like HEVC directly on Amazon Prime Video.
For those prioritizing file efficiency without sacrificing visual fidelity, the version is the gold standard. Here is why the HEVC release for S01E06 is the best choice for your collection. upload s01e06 hevc
A- (for content) / A (for HEVC quality)