This might be a case of an academic trying to be too clever. I find his ultimate argument turgid, although I would allow his first point as valid: πῐ́στῐς should be allowed to refer either to the act of believing, or to the referent of the belief. Context will determine which of these two nuances is inferred; and here I find both to be inferred. But I find some of his reasoning to be perverse:I have a few videos for you Greek scholars if you get bored. Tell me what you think. Source and content. One is Romans 1:17, and the other is Galatian 3:22. both about 12 minutes long.
At 9:00 ff., he says "The righteousness of God is revealed from this faith."
At 9:40 ff., he says "A very similar function is given to the faith here. It is the thing that reveals God's righteousness, without which no-one can become righteous."
At 10:04 "Just as the power of God for salvation is revealed in the gospel, so the righteousness of God from the faith."
My first point is that "ἐκ πῐ́στῐς" in Rom 1:17 doesn't lend itself to the conclusion that "faith is the thing that reveals God's righteousness."
Who is the gospel / righteousness of God" revealed to? It is revealed to those with faith, the adherents of the gospel and appropriators of its power.
Rom 1:17 must be taken in conjunction with Rom 1:16. By Rom 1:17, "In 'it' the righteousness of God is revealed," grammatically refers back to Rom 1:16 where 'it' infers the gospel. It is the gospel which is "the power of God." The righteousness of God is revealed by the gospel, not 'from the faith'.
In Eph 2:8 we learn (the grace of) the gospel is appropriated "through (διὰ) faith."
So my second point concerns the prepositions in Rom 1:17. ἐκ means "out of", εἰς means "into / unto." The idea seems to be that of an appropriator of the gospel's power & righteousness progressing from a little faith to a greater faith. Different nuances to πῐ́στῐς (confidence / trust-->belief / persuasion) and allusions by Christ to "measures of faith" suggest a little-->great interpretation, as personal righteousness increases in line with faith.
Alternately, different referents to πῐ́στῐς (Moses --> Christ) suggest another equally valid interpretation. In the end, I think both coalesce in the sense it was God's purpose to increase faith by sending his Son.