• Video 1 FL PrPC dots are mobile on the surface of live GT1 cells.
• Video 2 Clusters of Ab-patched FL PrPC are largely immobile on the surface of live GT1.
• Video 3 PrPSc strings on the surface of live ScGT1 cells are immobile, akin to clusters of patched PrPC.
• Video 4 Slow moving PrPSc strings and dots on the surface of live ScGT1 cells represent a major pool of surface PIPLC-resistant FL PrPSc.