User:Gerold Broser/Measure the speed of light one-way

In the YouTube video Why No One Has Measured The Speed Of Light of the Veritasium channel it is said that the speed of light can only be measured in a roundtrip.

Idea
Can't the speed of light be measured like the following (at least in theory)?



Why
Ethan Siegel in The Unexpected Reason Why The Smallest Black Holes Bend Space The Most about black holes:


 * "Or you could compress the Sun so much it becomes a black hole: [...] while light just outside it could deflect by 180° or even more."

Why not
In the said video it is referred to Albert Einstein's On the Electrodynamics of Moving Bodies :


 * "[...] if we establish by definition that the "time" which light requires in travelling from A to B is equivalent to the "time" which light requires in travelling from B to A. [...]


 * $$\frac{2\overline{AB}}{t'_{A}-t_{A}}=V,$$ [...]"

which implies that he hasn't thought of a one-way measurement.