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Ukranian drones dropping TM-62 anti-tank mines on Russian positions. More in the comments.
(streamable.com)
Video 2: https://files.catbox.moe/83wggp.mp4
Video 3: https://files.catbox.moe/lcbcz3.mp4
Video 4: https://files.catbox.moe/0aie2l.mp4
Possible drone: https://streamable.com/mboup9
The huge drones it takes to carry these mines would make them too easy to spot in the daytime.
So night time thermal operations are necessary.
I believe this is a demining effort. The Ukrainians have been using an innovative method of targeting mines. They said they would fly over mine fields in the early evening after sunset, the miners retain the heat from the day and can be seen on thermals. They are using the heavy mines to provide sufficient force to detonate nearby mines. Analysis was skeptical that it could work, but we're seeing video now and it's a pretty cool idea.