Could this be The 7 Trumpets of Revelations?

 The third angel sounded his trumpet, and a great star, blazing like a torch, fell from the sky on a third of the rivers and on the springs of water— the name of the star is Wormwood. A third of the waters turned bitter, and many people died from the waters that had become bitter. Revelations 8: 10-11

   I am still contemplating on these two video presentations whether all the detail assumes by the producer of this video corresponds to the actual events listed in The Book of Revelations; although I agree on some the undeniable detail like that of the scorpions and lions, which I've sometime ago share on this blog. About the stunning illustrations that St. John describes regarding vehicles and weapons of war around two thousands of years ago. 

   Obviously there is no way how John could have described helicopters and tank without actually seeing them in a vision. John's First century vocabulary was limited and therefore would simply compare the visions on things he already knew like chariots, horses, scorpions, and lions... 

   In the clip it was noted that Chernobyl was the same English word Wormwood in Ukraine and that Saddam in ancient Persian means the destroyer. There were also other detail pointed out that maybe you can help me discern with the help of the Holy Spirit of course whom Jesus promised to aid us in recognizing the truth. 

   Who are the four angels release at the Great Euphrates river?

    I've included the two chapters being studied here and highlighted the important detail that we must look into...I also would like to focus on the last two verses at the bottom of this article because that is the whole essence why Revelations was written--as a WARNING! 

Revelation 8

The Seventh Seal and the Golden Censer

 ¹ When he opened the seventh seal, there was silence in heaven for about half an hour.

 ² And I saw the seven angels who stand before God, and seven trumpets were given to them.

 ³ Another angel, who had a golden censer, came and stood at the altar. He was given much incense to offer, with the prayers of all God’s people, on the golden altar in front of the throne. ⁴The smoke of the incense, together with the prayers of God’s people, went up before God from the angel’s hand. ⁵ Then the angel took the censer, filled it with fire from the altar, and hurled it on the earth; and there came peals of thunder, rumblings, flashes of lightning and an earthquake.

The Trumpets

 ⁶ Then the seven angels who had the seven trumpets prepared to sound them.

 ⁷ The first angel sounded his trumpet, and there came hail and fire mixed with blood, and it was hurled down on the earth. A third of the earth was burned up, a third of the trees were burned up, and all the green grass was burned up.

 ⁸ The second angel sounded his trumpet, and something like a huge mountain, all ablaze, was thrown into the sea. A third of the sea turned into blood, ⁹ a third of the living creatures in the sea died, and a third of the ships were destroyed.

 ¹⁰ The third angel sounded his trumpet, and a great star, blazing like a torch, fell from the sky on a third of the rivers and on the springs of water— ¹¹ the name of the star is Wormwood.  A third of the waters turned bitter, and many people died from the waters that had become bitter.

 ¹² The fourth angel sounded his trumpet, and a third of the sun was struck, a third of the moon, and a third of the stars, so that a third of them turned dark. A third of the day was without light, and also a third of the night.

 ¹³ As I watched, I heard an eagle that was flying in midair call out in a loud voice: “Woe! Woe! Woe to the inhabitants of the earth, because of the trumpet blasts about to be sounded by the other three angels!”

Revelation 9

 ¹ The fifth angel sounded his trumpet, and I saw a star that had fallen from the sky to the earth. The star was given the key to the shaft of the Abyss. ² When he opened the Abyss, smoke rose from it like the smoke from a gigantic furnace. The sun and sky were darkened by the smoke from the Abyss. ³And out of the smoke locusts came down on the earth and were given power like that of scorpions of the earth. ⁴ They were told not to harm the grass of the earth or any plant or tree, but only those people who did not have the seal of God on their foreheads. ⁵ They were not allowed to kill them but only to torture them for five months. And the agony they suffered was like that of the sting of a scorpion when it strikes. ⁶ During those days people will seek death but will not find it; they will long to die, but death will elude them.

 ⁷ The locusts looked like horses prepared for battle. On their heads they wore something like crowns of gold, and their faces resembled human faces. ⁸ Their hair was like women’s hair, and their teeth were like lions’ teeth. ⁹ They had breastplates like breastplates of iron, and the sound of their wings was like the thundering of many horses and chariots rushing into battle.¹⁰ They had tails with stingers, like scorpions, and in their tails they had power to torment people for five months. ¹¹They had as king over them the angel of the Abyss, whose name in Hebrew is Abaddon and in Greek is Apollyon (that is, Destroyer).

 ¹² The first woe is past; two other woes are yet to come.

 ¹³ The sixth angel sounded his trumpet, and I heard a voice coming from the four horns of the golden altar that is before God. ¹⁴ It said to the sixth angel who had the trumpet, “Release the four angels who are bound at the great river Euphrates.” ¹⁵ And the four angels who had been kept ready for this very hour and day and month and year were released to kill a third of mankind. ¹⁶ The number of the mounted troops was twice ten thousand times ten thousand. I heard their number.

 ¹⁷ The horses and riders I saw in my vision looked like this: Their breastplates were fiery red, dark blue, and yellow as sulfur. The heads of the horses resembled the heads of lions, and out of their mouths came fire, smoke and sulfur. ¹⁸ A third of mankind was killed by the three plagues of fire, smoke and sulfur that came out of their mouths. ¹⁹ The power of the horses was in their mouths and in their tails; for their tails were like snakes, having heads with which they inflict injury.

 ²⁰ The rest of mankind who were not killed by these plagues still did not repent of the work of their hands; they did not stop worshiping demons, and idols of gold, silver, bronze, stone and wood—idols that cannot see or hear or walk. ²¹ Nor did they repent of their murders, their magic arts, their sexual immorality or their thefts.