These 'Comforter' texts were the main Bible passages appealed to by Muslims for Muhammad. The host responded that Jesus explicitly identifies the Comforter as the Holy Spirit, already known to the disciples and later indwelling them, so the passages cannot refer to Muhammad.
Scripture spotlight
John 14:16-17
bible
16 I will pray to the Father, and he will give you another Counselor, that he may be with you forever,-- 17 the Spirit of truth, whom the world can't receive; for it doesn't see him, neither knows him. You know him, for he lives with you, and will be in you.
Used to distinguish Father, Son, and Holy Spirit against the claim that Jesus simply is the Spirit; especially 'another Helper' and the Father sending the Spirit in Jesus' name.
Used against the claim that Muhammad is the Paraclete: the host argued the Helper/Spirit of truth is already known by the disciples, is with them, and will be in them, which does not fit Muhammad.
Cited as the passage Muslims often use to claim Jesus predicted Muhammad via 'another Comforter'; the speaker read it to argue the text refers instead to the Spirit of truth dwelling in the disciples, not to Muhammad.
Used to emphasize that Jesus promises 'another Advocate' who is already with the disciples and will dwell in them, arguing for personal distinction between Son and Spirit.