My quick translation:

French reporter 0-36 seconds: We are here in Sabra refugee camp for Palestinians in Beirut. What we have seen is atrocious. It is not something related to war, what you see is something terrifying. There is no political explanation, it cannot be possibility explained. No, it's the outcome of hate, we cannot even talk about it But we must say it, and we must show it and we must think in spite of it all.

The old man replying to the French reporter says that who killed them were the Phalanges led by the infamous Maronite Saad Haddaad.

The second part I think is just info that is easy to find about Sabra and Shatilla.

Sabra and Shatilla weren't the first nor the last massacre the Palestinians faced. The jewish hordes have committed numerous massacres against the Palestinians to get them out of Palestine. And in Lebanon, the Palestinians faced many massacres on the hands of the Maronites, the Shiites and the Syrians.

The best book on Sabra and Shatila is this one but it's rather large: https://www.amazon.com/Sabra-Shatila-Bayan-Nuwayhed-Al-Hout/dp/0745323030

As terrible as this massacre was, it is even more terrifying to know that after it happened, the remaining survivors were forbidden to talk about it in the camps by the Lebanese authorities. Moreover all the perpetrators became high office politicians who later run the country into the ground without any accountability to the killings.

To this day any Palestinians living in Lebanon are forbidden from work and from even fixing their homes or maintaining it!