Can the living really contact the dead?

“And the Lord God formed man of the dust of the ground, and breathed into his nostrils the breath of life; and man became a living soul.” (Genesis 2:7)

“Then shall the dust return to the earth as it was: and the spirit shall return unto God who gave it.” (Ecclesiastes 12:7)

“4 For to him that is joined to all the living there is hope: for a living dog is better than a dead lion.
5 For the living know that they shall die: but the dead know not any thing, neither have they any more a reward; for the memory of them is forgotten.
6 Also their love, and their hatred, and their envy, is now perished; neither have they any more a portion for ever in any thing that is done under the sun.”
(Ecclesiastes 9:4-6).

See the video below.