Here’s my thoughts on this - Netanyahu says the US and Israel are still “negotiating” over the red line.
Any red line deal between the US and Israel would presumably require that US upgrades Israel’s military capability. This is because Iran’s facilities will soon be too deeply buried underground (in the zone of immunity) for an effective Israeli strike. Absent such a deal I expect Israel to act very soon while they still can.
Of course it was an excellent speech. Netanyahu explained well why the red line has to be drawn at enrichment, not at weaponization.
Also the diagram of a bomb with Netanyahu drawing an actual red line with a marker really drove home the point in sobering fashion.