Eisenkot, who favoured war in the past, said he supports Trump's policy of "peace through strength" and that his policy of economic pressure has a better chance of giving the Islamic Republic "a sense of defeat" than a renewed military campaign.
The social media company X has taken down the initial posts that shared the videos and suspended the users for violating the platform's rules.
The speech was short by Netanyahu's standards, and he did not directly claim victory, only noting that his Likud was projected to be the largest single party.
CNN and the Washington Post, each citing an unnamed source close to the matter, said Bolsonaro had arrived in the US late Tuesday. Where he landed remains unknown.
Flavio Bolsonaro, who had President Donald Trump's tacit support, had been under investigation for corruption, money laundering and tax evasion in Brazil and had been ordered to surrender his passport.
Serious and unassuming, Gadi Eisenkot is in many ways the opposite of Netanyahu, Israel's longest-serving prime minister, who has flawless American-accented English and is ever ready with headline-grabbing soundbites on US television or social media.
His remarks come as the President has intensified his focus on election integrity ahead of the midterm polls, which will determine control of both chambers of the US Congress and could significantly affect his legislative agenda for the remainder of his term.
US Midterm Elections: The staggering sum is expected to give an edge to Republicans, as per some US news outlets, but things will be clear when the results of the midterms are announced.
Democrats need at least 218 seats in the House of Representatives to clinch a majority in the new session.
Republicans now hold a 53-47 advantage in the 100-seat chamber, counting two independents who vote with the Democrats.
