Hi LionKing, yes, the explosion has certainly been in the news, thanks to the shocking video that people have recorded.
I hope you and your family are safe.
Personally, I don't think it was a missile that caused the explosion.
For one thing, some of the video of the explosion shows a series of small flashes of light in the seconds before the massive explosion. I understand that fireworks were being stored near the ammonium nitrate. So it makes sense to me that the original fire caused some of the fireworks to explode, causing those flashes, and also contributing to the main explosion.
Another thing is the locations where the two videos were recorded. This is something you might be able to help with - do you recognise the locations where the videos were recorded? Do you think you could point to them on a map of Beirut. The thing is that in both videos the path of the 'missile' is from upper left to lower right. That suggests the two videos must have been recorded in roughly the same direction from the point of the explosion (after all, to someone on the opposite side of the explosion the 'missile' would have travelled from upper right to lower left). So if the videos were actually recorded from locations in widely different directions from the explosion then the missile must have been inserted into the video.
Finally, none of the several videos I've seen show any indication of a missile. If it was really a missile, then at least some other videos must surely show it.