That passage clearly speaks of the "feet" of the Father YHWH who is non-corporeal Spirit:
Zechariah 14:3-4 KJV
3. Then shall the Lord [YHWH] go forth, and fight against those nations, as when he fought in the day of battle.
4. And his feet shall stand in that day upon the mount of Olives, which is before Jerusalem on the east, and the mount of Olives shall cleave in the midst thereof toward the east and toward the west, and there shall be a very great valley; and half of the mountain shall remove toward the north, and half of it toward the south.
In addition you, like most, have neglected what in fact the same OT authors have already stated concerning the feet of YHWH in their own metaphorical prophetic utterances and writings:
Nahum 1:1-3 KJV
1. The burden of Nineveh. The book of the vision of Nahum the Elkoshite.
2. God is jealous, and the Lord [YHWH] revengeth; the Lord [YHWH] revengeth, and is furious; the Lord [YHWH] will take vengeance on his adversaries, and he reserveth wrath for his enemies.
3. The Lord [YHWH] is slow to anger, and great in power, and will not at all acquit the wicked: the Lord [YHWH] hath his way in the whirlwind and in the storm, and the clouds are the dust of his feet.
THE CLOUDS ARE THE DUST OF THE "FEET" OF YHWH:
Matthew 17:4-5 KJV
4. Then answered Peter, and said unto Jesus, Lord, it is good for us to be here: if thou wilt, let us make here three tabernacles; one for thee, and one for Moses, and one for Elias.
5. While he yet spake, behold, a bright cloud overshadowed them: and behold a voice out of the cloud, which said, This is my beloved Son, in whom I am well pleased; hear ye him.
Luke 9:27-35 KJV
27. But I tell you of a truth, there be some standing here, which shall not taste of death, till they see the kingdom of God.
28. And it came to pass about an eight days after these sayings, he took Peter and John and James, and went up into a mountain to pray.
29. And as he prayed, the fashion of his countenance was altered, and his raiment was white and glistering.
30. And, behold, there talked with him two men, which were Moses and Elias:
31. Who appeared in glory, and spake of his decease which he should accomplish at Jerusalem.
32. But Peter and they that were with him were heavy with sleep: and when they were awake, they saw his glory, and the two men that stood with him.
33. And it came to pass, as they departed from him, Peter said unto Jesus, Master, it is good for us to be here: and let us make three tabernacles; one for thee, and one for Moses, and one for Elias: not knowing what he said.
34. While he thus spake, there came a cloud, and overshadowed them: and they feared as they entered into the cloud.
35. And there came a voice out of the cloud, saying, This is my beloved Son: hear him.
And if one is so bold as to ignore this information we have the same testimony from Peter concerning this event which flies in the face of those who disbelieve the record having been written in the Gospel accounts:
2 Peter 1:16-21 KJV
16. For we have not followed cunningly devised fables, when we made known unto you the power and coming of our Lord Jesus Christ, but were eyewitnesses of his majesty.
17. For he received from God the Father honour and glory, when there came such a voice to him from the excellent glory, This is my beloved Son, in whom I am well pleased.
18. And this voice which came from heaven we heard, when we were with him in the holy mount.
19. We have also a more sure word of prophecy; whereunto ye do well that ye take heed, as unto a light that shineth in a dark place, until the day dawn, and the day star arise in your hearts:
20. Knowing this first, that no prophecy of the scripture is of any private interpretation.
21. For the prophecy came not in old time by the will of man: but holy men of God spake as they were moved by the Holy Ghost.