El-Fasher residents Mostafa, Hafiza and Manahel film as their home city comes under fire in Sudan's civil war.
Foreigners are however allowed to buy gold directly from GoldBod, a new state regulator.
People share videos of themselves crying, saying that they cannot withdraw their money on CBEX.
The UK is promising an extra $120m (£91m) worth of food and medical assistance.
Rare accounts of life in el-Fasher - the last major city in Darfur controlled by the Sudanese army.
The UN cites "credible sources" for the estimated death toll of recent attacks on refugee camps in Darfur.
Facebook
Twitter
Pinterest
Instagram
Google+
YouTube
LinkedIn
RSS