People I know heard strange sounds in the sky

Not exactly personal, but a few people are personally know have experienced it
has anyone experienced strange noises, which apparently coming from the skies, and its loud...from all over the world, since the end off 2011.

there are 100's of videos from usa,uk,russia,chile, to name a few places

https://www.youtube....h?v=PvghK3D8AfQ

https://www.youtube....h?v=hvhuXgZ_LQs