Combining the hadith about beheading the one who fights with the ruling on obeying the one who prevails by the sword

Question:
This questioner asks: How do we reconcile the statement of the Messenger (peace and blessings be upon him) with the scholars' statement that if a man compels people with the sword, obedience to him becomes obligatory?

Answer:
These people have no imam. When the people have no imam and one of the Muslims comes, one of the Muslims comes and fights until they submit to him. He is a Muslim and he fought these divided and differing people; he fought them until they became upright and they had a congregation. So obedience to them becomes obligatory. As for this one, an imam is already established, and he wants to seize the authority from him. This is the one who deserves to be killed. As for the one who prevails over the people with his sword, this is what happened, and they had no faith. So he gained strength, he gained courage, and he gained leadership, and he took control of the matter. His obedience is obligatory as long as he is a Muslim. Yes.

The presenter:
May Allah reward you.