Great news for those who find it difficult to find models to draw from. There are two YouTube channels that offer either still images of models or filmed the model as he/she posed. You start out with a series of short poses leading to 10 minute poses.
The first Channel is On Air Video
This Channel records their models in real time doing 1, 2, and 5 minute poses.
The other channel is New Masters Academy
New Masters Academy offers still images of the models posing for 1, 2, 5 and 10 minute poses.