This is completly a false statement with misleading evidence to back it up. For one, they used a social media post to prove their claim, which no one should use as a reliable resource when getting information. Additionally, the video being used in the post looks to not even be actual camera footage but from a video game of some kind, as the graphics are not realistic. The video is also blurry, and you can't see anything that directly proves a Russian drone is in the video, let alone targeting a school bus. While the Russians do use drones in their fighting tactics they are mostly targeting things like their gas and military which is a common target during a war like Russia is in right now with Ukraine rather than wasting their materials on a school bus. It is also a war crime to target civilians who are the only passengers of school buses and even worse usually children. Below is an article on a Russian attack on a gas infrastructure from a more reliable source with quotes and evidence to back up their claim that didn't come from a social media post.
https://www.reuters.com/world/europe/russian-air-attack-kills-three-ukraine-kyiv-says-2025-02-01/