Pashalis,maybe he did,but it's probably true that he had real 'high strangeness' expiriences.
He did talk about 'matrix' reality back then,and understood deja vu phenomenom quite well.
And those sightings of 'aliens' ,and being contacted by some of them,are in my opinion true cause I can see why they would have interest in him.His books had great impact on society and 'global mind'.
It is even possible that they channeled information to him or more probably programmed him to write it, he,idd wrote some books amazingly fast.
In his book 'Flow My Tears, the Policeman Said' he writes about dark future where USA is police state.
In first video I posted he says he was contacted by that strange woman that told him some of his books are real truth,he mentioned 'Flow My Tears, the Policeman Said' by name.
Dick explored sociological, political and metaphysical themes in novels dominated by monopolistic corporations, authoritarian governments and altered states.
P.S. I'm going to read his books,maybe I find valuable clues inside,or atleast some fun