watch ‧ a ‧ ble /ˈwɒtʃəb ə l $ ˈwɑːtʃ-, ˈwɒːtʃ-/ BrE AmE adjective informal
[ Word Family: noun : ↑ watch , ↑ watcher ; adjective : ↑ watchful , ↑ watchable ; verb : ↑ watch ]
if a film, television programme etc is watchable, it is interesting and enjoyable:
a highly watchable film