Does a video shared on social media show a young man being drafted and taken away by the military during a class at a Ukrainian university? No, that's not true: The video was filmed in September 2022 at the Shehyni checkpoint on the border between Ukraine and Poland and the man shown was not forcefully enrolled into the military.
The claim originated from a video (archived here) published on TikTok on April 1, 2023, under the title "Ukraine mobilization at the University." On the video, a graphic in English reads:
Ukraine Mobilization In University.
The same sentence appears below in Polish.
This is what the post looked like on TikTok at the time of writing:
(Source: TikTok screenshot taken on Fri May 12 09:58:56 2023 UTC)
The video does not show a university in Ukraine but the Shehyni checkpoint on the border between Ukraine and Poland.
It was filmed in September 2022, during a student protest at the border, where protesters were detained by the police. The students (young men, not allowed to leave the country during wartime) demanded permission to leave the country to continue their studies at foreign universities.
The original video was published on the YouTube channel of BBC Ukraine on September, 30, 2022, as part of their coverage of the protest.