This looks like a game of high-stakes chicken. There are a set of international collision regulations (COLREGS) that every cadet all over the world has to learn by heart to gain a certificate of competency.

Sometimes these rules are inaccurately reduced to "right of way" rules. In fact, the rules oblige actions on all ships in a potential collision situation: one will be the "stand-on vessel", and the other will be the "give-way vessel": obliged to make an early and obvious maneuver to avoid the collision, in a prescribed direction (generally turn to starboard). The ships involved can instead get on the radio and negotiate a different plan, but absent that, these are the rules.

One rule governs overtaking, where the vessel being overtaken is the "stand-on vessel" and the vessel overtaking is the "give-way vessel". Another governs crossing, where in a crossing path situation the vessel which has the other ship to port (on the left, looking forward) is the "stand-on vessel" and the other is the "give-way vessel".

So in the situation we see in the video, the ship in which we are standing is clearly to port of the other vessel and so would be the "give-way" vessel. It should have made a slight starboard turn much much much earlier to pass behind the other vessel.

Except what if the other vessel overtook this ship and passed in front? This happens sometimes, where a vessel in a hurry and in the "give-way" position decides to make an early change to put it in the "stand-on" position and force the other ship to move. This is what's known internationally as a "dick move" and probably criminal.

Unless we have the full radar track for both ships we can't know who was at fault. Since they thankfully didn't collide, the MAIB won't have to figure this out and send anyone to jail.

This is Russia. For a small bribe any knowledge is optional and certification can be bought.

May not have been a deliberate act; head down, looking into a cell phone, stepping off the bridge to use the head (toilet)--no watch, no radar alert---and then you have a lot of mass moving really pretty darn quick and a collision course.