Hard to tell from either your post or the video which cable shorted out. It was only shown briefly in the video but it looked like the large cable coming directly off the positive battery post. And that shorted (via the battery charger clamp?) to the closed hood.
If that's the case, I think you are fine. Electricity follows the shortest path and really doesn't go anywhere else, so all the electric current was travelling through the short, I don't see why it would have affected anything else.
Cool engine, that SHO. I am putting one in my Lancia 037 Stradale project, in a mid-engine, longitudinal configuration, backed by a Porsche Boxster transmission. Glorious looking intake.
81 F150 Flareside, Edelbrock Pro Flow4 FI, hydraulic roller 351W, E4OD, 4x4, BW1356
92 F150 RCLB 351W E40D BW1356 mostly stock