I did not recognize Him, but He who sent me to baptize in water said to me, 'He upon whom you see the Spirit descending and remaining upon Him, this is the One who baptizes in the Holy Spirit.' John 1:33
And so we read that John was given a witness to this promised event so he would know who is the one God had sent. We only need to read in context to see the connections. John was 'preparing the way' (John 1:23) for someone who would follow him - he was doing so without knowing exactly who was going to follow, but understood it was of God.
And I knew him not, but so that He would be revealed to Israel, I came baptizing in water.” 32And John testified, saying, “I have seen the Spirit descending as a dove out of heaven, and it remained upon Him. 33And I knew him not, but He who sent me to baptize in water said to me, ‘He upon whom you see the Spirit descending and remaining upon Him, this is the One who baptizes in the Holy Spirit.’ 34And I myself have seen, and have testified that this is the Son of God.” John 1:31-34
This isn't about John 'not recognising' Jesus - as if he was disguising himself. John didn't know who Jesus was - God had to point him out and confirm His chosen one with the sign of the dove.
This passage simply describes the matter of Jesus being given the Holy Spirit at his baptism by his God and Father. This is in preparation for the first of the temptations with the devil, and then to begin his ministry.
Jesus would baptise with the spirit at some later event and this hints vaguely of that time but is intended primarily to differentiate between John's baptism of water and Jesus' of the spirit. Other than that, this verse speak nothing more about the time or significance of the better baptism.
Jesus would give the spirit to those he had prepared to begin the church after his resurrection. It is only after he is risen and exalted with new spirit life that he could give them this provision of the Father.
Therefore, since He has been exalted at the right hand of God, and has received the promise of the Holy Spirit from the Father, He has poured out this which you both see and hear. Acts 2:33