He makes an offhand comment implying he doesn't feel they're incompatible, but not in any official stance as an Oracle lawyer. He then qualifies that by saying, more or less, Oracle has not come after anyone over OpenZFS, so everyone should be taking that as an indication that it's OK with Oracle.
It is till it isn't. And some lawyer, even Oracles lawyer, who says in an offhand comment something is fine means nothing if it ever goes to court and "but I saw it in a video" won't be a defense.