In Bucha, this is definitely a staged fake of Ukrainian propaganda, filmed on professional film equipment. Here is a video of the cleansing of Bucha by the Ukrainian police, there, for the whole time, a corpse in military uniform flashed in the frame once, there are no civilian corpses there. The decision to provocation under a false flag was apparently made by Ukraine later.
There are satellite images from March 9-11 that show many of the same bodies on the road in the exact same positions that were filmed after Russia retreated from Bucha a few days ago.
https://www.nytimes.com/2022/04/04/world/europe/bucha-ukraine-bodies.html
Are you really gullible enough to believe that Ukraine went into a town while it was occupied by Russian forces and executed a bunch of people?