A webcam was installed on the shore of the South-Eastern Baltic (Kaliningrad Oblast, Russia) to monitor the beach dynamics and beach-cast (BC) daily from November 1, 2019, to October 31, 2020. The beach was formed not the whole year (77%). The most frequent BC residence time was one day (1–21, 4.1 on average, and 1–19, 4.3 on average days to the west and east of the groin, respectively). The BC consisted primarily of algae. Fresh BC occupied smaller area, and its layer was thicker than that of long-discarded and trampled BC. The specific amount of material (per m2) in a fresh BC was 3.7 times higher in volume and 2.6 times higher in weight than in long-discarded and trampled BC. For fresh and old BC, the specific volumes were 63 and 17 l per m2, respectively, and the specific masses were 48 and 18 kg per m2, respectively. •First video-monitoring the beach (B) and beach-cast (BC) in South-Eastern Baltic•One-year data showed seasonal variability of B and synoptic for BC presences.•Most frequent BC residence time lasted 1 day; it ranged 4.1–4.3 days on average.•Fresh and old BC specific volumes are 63 and 17 l per m2 of the beach-cast.•Fresh and old BC specific masses are 48 and 18 kg per m2 of the beach-cast.