So recently I noticed videos, mostly on youtube do not load in safari. The box with the videos remains black and it will not load in the player as well. Is there a way to reinstall safari or is there any other fix for this? I do not know what tweak can make this happen, I do not have any tweaks that would interfere, as far as I know. However, in Mercury everything works, just not in safari... I have a 5s with ios 7.