The video accepts that sustained World War I-era fire could devastate the island's surface and drive the defenders into deep bunkers. The central constraint is time: reducing protected positions would take longer than the Grand Fleet needed to raise steam and reach the area. German ships would remain exposed to the garrison and local craft throughout that race. Battlecruiser speed cannot solve a problem in which shells reach the objective faster than ships and the fleet must stay to complete the bombardment. Success therefore requires Germany to suppress the island before British relief arrives while absorbing continuous local attrition.
Notable Point · 1:06:47-1:08:05
Bombardment races British reinforcement
Why even a destructive bombardment may take too long to defeat the island before the Royal Navy arrives.