Ryan R. Cheng has graciously provided these two movies, one showing Rouse dynamics and the other illustrating the motion of the Rouse model with internal friction (RIF) in the internal friction dominated limit.

Rouse RIF

The latter case is discussed in this paper:

Ryan R. Cheng, Alexander T. Hawk and Dmitrii E. Makarov, Exploring the role of internal friction in the dynamics of unfolded proteins using simple polymer models, J. Chem. Phys. 138 (2013) 074112, link