Speculations over Ma's unusual absence were rife in the wake of news this month that the Alibaba founder was replaced as a judge in a reality TV show.
The Bank's decision on Ant coincided with the Chinese government's market regulation agency decision to open an anti-monopoly investigation into Alibaba.
In the 50-second video, Ma congratulated teachers supported by his foundation and made no mention of his disappearance or official efforts to tighten control over Alibaba and other internet companies over the past six months.
The conglomerate's present difficulties date back to late October, the last time Ma was seen in public, when he delivered a speech that was sharply critical of both regulators and China's banking sector.
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At the conference in Shanghai, Ma called for reform in China's regulatory system, described the country's financial watchdog as a "pawnshop" regulator, and suggested that the system "stifled business innovation".
"My colleagues and I. are even more determined to devote ourselves to education and public welfare", he said, according to a transcript of his speech published by news site Tianmu News.
Uncertainty as to the eventual outcome of ongoing regulatory and state intervention into Ma's business persists, notwithstanding the entrepreneur's brief resurfacing earlier today.
"Every year for the past five years have come to Sanya to recognize our teachers, show gratitude to our teachers and respect our teachers", Ma said in the video.
Alibaba's share plunged 9.6 percent in Hong Kong the day the suspension of Ant's IPO was revealed on November 4, and its NY listing fall 8.1 percent the following day, wiping almost $76 billion off its value, more than double the amount Ant was planning to raise.
Ma, a ruling party member, stepped down as Alibaba chairman in 2019 but is a member of the Alibaba Partnership, a 36-member group with the right to nominate a majority of the company's board of directors.
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However, a 23% week-on-week drop in the number of reported new infections is cause for optimism, he said. Veterans Affairs hospitals in 2020, they found that survival rates improved between March and August.