You might find this a bit slow going but you don't tend to see a study just on the two witnesses of Zechariah the way John has framed the study. It has its moments so I consider it worth a look. Especially the bonus section towards the end of the video.
24 Nov 2023 - The 2 Witnesses of Zechariah 4, Part 2 - John Kostik
Here is part one but I would recommend just watching part 2 unless you have never heard of the 2 Witnesses out of Revelation before.
4 Jun 2023 -The 2 Witnesses of Revelation 11, Part 1 - John Kostik