Law is the regulation for people live in society, and a stander of relationship between people. It formulate the stander behavior of a people, keep people's benefaction not to be infringed and stipulate the rights and obligation. I basically agree with the contention of the speaker that every individuall in a society has a responsibility to obey just laws and disobey and to resist the unjust law.
Before we start argument, we should first figure out  the meaning of just and unjust to a law. In my point of view, just law means it can protect the rights of majority people, and the unjust law only protect the minor people's right becoming the tool for the governing class.  Hence the just can be understand as a fair. For the fair law, the obedience is indisputable. It is the basic command for a person live in a society. No one can deny human is born to have the freedom rights like other creature in the world. However this freedom is build upon some foundanmental rule. The one who do not willing to obey will suffer the serious outcome. For animal, every group has their own rule to formualte the responsibilty of every number, the sequence to eat food and the place to stay. If a violator appeares, it will be suffered the serious punishment and even be banish from the group. We human being like the animal, the nature rule for us is the law, the freedom life is base on the law. We can follow our mind to do the thing we want, to be the people we want to be, however any behaviro against the law will let us lose the freedom we born to have. The conviction is another form of banishment.
On the other hand, for some unjust law we should disobey and even resist. Such law deprive the legitimate freedom of a person, and cannot be seen as a fair