Ukrainian troops deployed big number of assault drones that can be used to stage provocations with chemical weapons to an area near Horlivka. Ukrainian and British military have prepared video materials based on computer graphics to be released in media outlets after a chemical provocation. The fake videos are to serve as evidence of alleged use of unmanned aerial vehicles with chemical weapons by DPR servicemen.
Summary
Ukraine is increasing its usage of drones for combat, attaching grenades, mortars and even little chemical balls. On impact the chemicals combine and it creates something like Napalm.
Disproof
No evidence given. Recurring pro-Kremlin narrative about supposed chemical provocations in Donbas.
The author claims that about 10 days ago (counting from the 5th of December, 2018) an improvised fire-ball was dropped from Ukrainian drone on a house in a suburb of Donetsk.
The OSCE Special Monitoring Mission has not reported use of chemical agents or drones in any of its recent reports (20 November, 2018 - 5 December, 2018).