Thank you for your 6/22 post Ezekiel's Visionary Temple - Too Massive to Build  I didn't realize it would be so big, but whether the Lord Jesus has a temple descend from heaven or He builds it on Earth, Zechariah 6:12-13 says, "And speak unto him, saying, Thus speaketh the LORD of hosts, saying, Behold the man whose name is The BRANCH; and he shall grow up out of his place, and he shall build the temple of the LORD: Even he shall build the temple ofthe LORD; and he shall bear the glory, and shall sit and rule upon his throne; and he shall be a priest upon his throne: and the counsel of peace shall be between them both." Jeremiah 23:5, "Behold the days come, saith the Lord, thatI will raise unto David a righteous Branch, and a King shall reign and prosper, and shall execute judgment and justice in the earth."  The BRANCH and the righteous BRANCH in these 2 verses is none other than the Lord Jesus Christ

who builds the temple that will be on Earth after His second coming. However, Zechariah 6:15 also says, "And they that are far off shall come and build in the temple of the LORD, and ye shall know that the LORD of hosts hath sent me unto you. And this shall come to pass, if ye will diligently obey the voice of the LORD your God." So I am leaning toward the Lord Jesus building the temple of God on Earth with the people on Earth building in it as well. 

As for the size of Ezekiel's temple in the video Ezekiel’s Visionary Temple: A Blueprint Too MASSIVE To Build?  that you posted, it tells us that the consecrated district that contains the temple, the priest's housing, the Levites housing, and the city of Jerusalem itself will be approximately 8.3 miles x 8.3 miles which is small in comparison to the city of New Jerusalem that will descend out of heaven which is 12,000 furlongs in length, width and height according to Revelation 21:16. 12,000 furlongs is 1,500 miles x 1,500 miles so Ezekiel's millennial temple doesn't correspond to the city of New Jerusalem that descends like you thought it did in your 6/22 post Ezekiel's Temple Corresponds to Revelation 21 because Ezekiel's millennial temple is much, much smaller than the city of New Jerusalem.  1,500 miles is 7,920,000 feet so the diameter of the square city is 7,920,000 ft. x 4 = 31,680,000 ft.  LORD JESUS CHRIST is 3,168 in Greek gematria.