Planet & Climate - 7 free documentaries about glaciers & ice sheets.
Start with The melting ice of the Arctic (1/2) (42 min, DW Documentary), then Live from the Doomsday Glacier in Antarctica with Miles O'Brien (70 min, NOVA PBS Official). All 7 documentaries here are free to watch from their makers' official uploads. To read deeper, the top-rated book on glaciers & ice sheets is Arctic Dreams by Barry Lopez.