A former TikTok content moderator in Kenya, James Oyange Odhiambo, has alleged that he developed post-traumatic stress disorder (PTSD) due to his work and was unfairly dismissed for advocating for better working conditions.

The law firm representing Odhiambo has sent a letter to TikTok's parent company ByteDance and the outsourcing company Majorel threatening a lawsuit if their demands are not met within two weeks. The letter alleges that content moderators were, at times, required to watch between 250 and 350 disturbing and violent videos per hour without adequate mental health support. A TikTok spokesperson declined to comment on the accusations made in the letter. ByteDance did not respond to Time's request for comment.

This case follows similar legal trouble faced by big tech companies over content moderation in Kenya, including a ruling that Facebook's parent company Meta could be held liable for law violations.