Palestine is a "non-Member Observer State" of the United Nations. This means there is a state called Palestine.

I found the style of the video too obnoxious to watch much of it, so I wasn't able to find any historical claims. Are there any claims in particular you are interested in?

This submission has been removed because it involves current events. To keep from discussion of politics, we have a 20-year rule here. You may want to try /r/ask_politics or another current-events focused sub.