3:24 "byte is half of a half-word"? what then on 64-bit or 128-bit RISC-V; is a byte no longer 8-bit? The rest is explained clearly but it should be noted that (glossing over the history lesson) a byte equal to 8 bits is an SI unit and there's nothing else that needs to be reasoned about it since that definition has existed prior to the invention of RISC-V ISA.
