Has the release of Gog and Magog already occurred, and how can one comment on this discourse?

The speaker was correct in his description of Dhul-Qarnayn's journey and his construction of the barrier to contain Gog and Magog. However, he erred in his interpretation of Allah's saying: "Until when Gog and Magog are let loose, and they swiftly swarm from every mound" (Quran 21:96), where he claimed that "let loose" (futiḥat) means victory and that the verse refers to the conquest of the lands of Gog and Magog and people flocking to them. The correct understanding is that "let loose" (futiḥat) here means "breached," and that Gog and Magog are the ones who swarm from every place.

He also erred in his claim that the Dajjal (Antichrist) is television, and in his interpretation of the prophetic hadiths describing the Dajjal to align with this explanation. The correct understanding is that the Dajjal is a human being who will emerge at the end of time, and Isa (Jesus), peace be upon him, will kill him after his descent. Gog and Magog will emerge after Isa, peace be upon him, descends and kills the Dajjal.

It is evident from the Quran and Sunnah (definition) that Gog and Magog are in the lands of the East, and that Allah has concealed them until their emergence, and that the barrier will not be opened except by their digging through it.

Finally, it is advised to warn against such deviant interpretations and to read reliable books concerning the Signs of the Hour.