The video was filmed near the bridge across the Sviyaga river in the city of Ulyanovsk in August 2020. In the video, the transport bridge built in 1955 has not yet been destroyed. In the area of ​​the bridge, the surface of the Sviyaga is densely covered with duckweed aquatic plant.

Lesser duckweed (lat. Lemna minor) is a perennial aquatic plant, a species of the genus Lemna of the subfamily Duckweed of the Aroid family (Araceae). There are often so many of these plants that they completely cover the reservoir.

https://youtu.be/5W0o76nshlQ