The .mil one initially looked like it would be the most reputable, but the title of the publication immediately cast doubt on its integrity. I read through it anyway, and found that they think Israel started its nuclear program with 200 pounds of lost uranium...but that they found 220 pounds of uranium in the plant when it was decomissioned...they found more than they lost. The article flips back and forth between measuring systems (it actually lists the found uranium in Kg but the lost uranium in lbs). I cannot use that as a reputable source, it is too poorly written.
The youtube video is from the Russian Government Owned TV channel...and they did not even bother to show the papers they claim show the nuclear weapon info. They say they exist, but do not bother to show them. It is a non-source.
The ploughshares paged does not exist. Did you even look at your sources before saying they are actual supporting sites? So far, it is 0 for 3.
I started with what I felt would be the most reliable, but I am ending with the wiki, since it is often very reliable, but you have to follow the support the site lists to double check it. It took the longest time to check (15 minutes, give or take a few).
The wiki article is also the most compelling. It shows how Israel could have developed nuclear weapons on its own. It falls far short of actually showing Israel has nuclear weapons, though. It simplly assumes they do and goes from there.
Do you have any actual sources which show that Israel has nuclear weapons? The declassified South African documents the Russian State Run news agency mention would do it.