The video mixes a real historical claim about 1971 with garbled speech and some unclear assertions. The main factual points about the Bangladesh Liberation War and the surrender of Pakistani forces are supported, though the genocide framing is a contested legal-historical label.
Claim-by-claim breakdown
Accurate (86% confidence): The Pakistani army committed mass atrocities against Bengalis in East Pakistan in 1971, commonly described as the Bangladesh genocide. Historical sources and major references describe the 1971 crackdown as mass atrocities against Bengalis, and the U.S. Congress has introduced/considered resolutions recognizing the Bangladesh Genocide of 1971.
Accurate (95% confidence): The 1971 war ended on December 16, 1971, with the surrender of about 93,000 Pakistani troops and personnel. Britannica states that the 1971 India-Pakistan War ended with the surrender of Pakistani troops in East Pakistan and the birth of Bangladesh, with nearly 93,000 prisoners taken.