Your friend was right.
My Serbian is getting very rusty, but I'll give some highlights of portions I was able to view. I had a good deal of trouble playing the video (kept getting those red dots, then jumping to video of another speech more about economic impact on Serbia, red dots again), which was very, very frustrating. The following is disjointed and likely not in chronological order due to my difficulty viewing the video. Text inside [brackets] indicates I am unsure or having trouble getting the nuance right. Text inside (parentheses) indicates I am paraphrasing or quickly going from memory. Text with no quotation marks, and not inside brackets or parentheses, are my own words, as are those inside [[double brackets]]. Finally, I hope I didn't mix in anything from the second speech by accident.
Re condemnation of the attack on Ukraine: "The text does not mention any sanctions, but it is important for us to condemn the collapse of the territorial integrity of any member state."
(It has never been harder for him and he has never struggled more with being [distressed/disheartened] in the past ten years.) "The crisis due to the war in Ukraine is affecting Serbia dramatically. What is not easy to explain is the connection between politics and the economy, the influence of politics on the economy, the pressures we are exposed to and everything that lies ahead.
"Since Friday, the whole world has become different in just three, four, five days and nothing is the same anymore. ... "Everything we knew yesterday does not look like what we are going through today" ... "Tectonic changes have taken place on the world stage, and Serbia is in an extremely difficult situation. It is not a question of the correctness of our position, but of the incredible circumstances that brought us into a difficult situation."
"In the previous 48 hours ... [[Sorry, I could not quite catch his words]] ... there is no representative of any important country with whom I have not talked. I spoke with Ursula von der Leyen, a representative of Germany -- USA, France -- exchanged messages on all important issues -- from voting for a declaration and a resolution to the sanctions imposed on Russia."
"Serbia kept its same position as in the previous days. Out of a total of thirteen acts, we voted for four acts, but we could not vote for nine, because they concerned the introduction of sanctions on the banking sector or air transport or directly on individuals from Putin, Lavrov, Peskov to everyone else."
"There is less than ever an understanding for the position of Serbia and our people anywhere in the world" ... ""Few people are interested in what happened in 1999." ... "There is almost no representative of large countries with whom we have not spoken. Serbia is facing enormous pressure with the fact that few people want to hear our arguments, then it is clear to you how difficult our position is."
"I think that this is just the beginning, the pressures on our country will be huge in the coming period... We will witness the complete destruction of the existing order." (Serbia can expect to see several political traps in the coming period.) "Not because they care about Russia and Ukraine, it doesn't bother some people in the region, they do everything they can to overthrow Serbia. You saw that the Albanians* sent a request to become a full member of NATO, and they received support. "Regarding Turkey, what I can predict is that some of the next initiatives will be the exclusion of the Russian Federation from the UN."
"I already see initiatives in certain countries, and I say that because we are following them, Albanians in Kosovo and some others..." ... "In accordance with Article 6 of the UN Charter, they plan to discuss the expulsion of Russia from the UN, and after that there will be pressure on China to change Resolution 1244 and after the change of Resolution 1244 we have no legal basis to invoke international law and preserve our territorial integrity as we have it today ... and then follows the recognition by NATO and EU countries, those that have not done it so far, of the independence of Kosovo."
"This is the idea of Albanian** lobbyists and they presented it to international representatives." ... "Whether it is possible or not - I do not rule out that possibility at all. Will someone say that it is not technically possible, I thought everything was not possible, and in these three or four days I saw that it is possible."
"This is only one part of the problem. The other part of the problem, is that, if we keep our position, of further endangering Serbia's economic position through less investment in the future."
Answering question about what kind of reaction he expects from Russia after Serbia's vote in the UN: "After what Bosnia-Hercegivina did today, Serbia is the only one in Europe that did not impose sanctions."
"In accordance with the conclusions of the National Security Council, we will keep the peace in the region and be lenient, and we will not respond to daily provocations from Pristina and other parts of the region."
"A decision will be made tonight on whether a protest note would be delivered to Turkey. We certainly do not see as a friendly move the statement given in the conversation with Vjos Osmani and the fact that Recep Tayyip Erdogan said that without asking anyone, Turkey will always make a decision on its own on Kosovo's accession to NATO."
*I am certain he means ethnic Albanians of Kosovo.
**I assume he means ethnic Albanians of Kosovo, but there is a remote possibility he means Albanians of Albania.
Me talking here:
Re Kosovo in NATO. They popped up yesterday or day before, asking to get fast-tracked into NATO right away and saying they want to host an American base. My immediate thought: Hey, NATO is already is in you, Kosovo -- it's called KFOR -- and you already have American Camp Bondsteel, which anyone could see from the start was built for the ages.
For more context re Serbia's dilemma:
Latest Serbia news in English, latest Kosovo news in English, Serbian economy news, Serbian business news, Serbian politics news, Balkan regional news in English
www.b92.net
EDIT: No, it's not pure crazy talk from President Vučić (although it won't actually happen):
In wake of Ukraine invasion, diplomats consider if Russia can be removed as one of five permanent security council members
www.theguardian.com