I always have a TON of questions when situations like in the video happen and the possibles outcomes and what the countries are "thinking" to do what they are doing.

Is there any study about how much USA depends on china for it's economy? nowadays every thing I check that is mass produced it's made in china (except food), at least in europe, where I am from. If my country decided to forbid the entrance of chinese products I think it could be pretty devastating for the economy until we could import the same products from other sources and the prices for everything would skyrocket.

Having said that when china does something that they know USA(or any other country) won't like do they stop for a second, think "meh their economy depends too much in us, we can make X or Y and get away with it because they won't risk an economy crisis for something like this" and then just do it? this is not to bash china, I think the same about what russia did with crimea or as you say USA with the gulf of mexico.

Where do countries draw a line and say THIS I will not let you do it. If hypothetically something like pearl harbor happened again, do not focus on what lead to pearl harbor happening but just one day china for no apparent reason attacks another country's battleship and say "sorry it won't happen again" like, it wasn't an error, we just did it but will not happen again. what could a country do against that? declare war? if so, what would they attack exactly? when I think of old wars it all came down to conquering the offender's country but nowadays? I guess the attacked country would request to extradite all the people involver with the attack but if they refused what would happen? maybe convince other countries to cancel all trades with them but how many would be willing to do so? would something like that lead to a real war if done to a powerful enough country or would it all come down to politics and economy and just cancel all trades and pacts?

note that I know pretty much nothing about foreign relations and the international protocols but I feel USA/china is a good seting because of the big differences in culture and country mentality, Europe/russia seting would be interesting to me too.

Also, did china agree to these "international laws"?