Don't let the third sentence type confuse you. The subordinate clause is an insertion and the outer sentence structure is not changed by it. The normal sentences would be
Jeder ist für das verantwortlich.
Ich werde dir helfen.
The conjugated verb is at the second position as usual. The tricky part is were to insert the subordinate clauses. In the first example right after the part that is restricted by it. In the second example I would assume it is inserted behind the object.
However, there are dependent subordinate clauses which work differently.