Honestly, today's crop is thin — most of the candidates are hashtag-spam factory clips from roll-forming machine vendors with no real teaching content. This STEELROCK WORKSHOP demo is the most substantive of the bunch, and it at least focuses on a single, clearly-defined operation: producing a clean 90° bend in steel plate on a press brake.

Press brake work looks simple from the outside — clamp material, push down, get bend — but achieving a true 90° angle is where the craft lives. The bend angle you get depends on the interplay of tonnage, die opening (V-width), punch tip radius, material thickness, and springback. Mild steel will spring back roughly 1–2° after the ram releases, so operators typically overbend to compensate. The rule of thumb for die selection is a V-opening around 8× material thickness for standard bends, which sets both the inside bend radius and the force required.

Watch for how the operator positions the workpiece against the back gauge (critical for repeatability), whether they're using a bottoming or air-bending technique, and how the finished corner looks — a crisp inside radius with no cracking on the outside tension face is the sign of correct tooling choice for the material.

Caveat: at 862 subs the channel is small enough that production quality may be modest, but the topic is a legitimate fabrication fundamental.