“Dagr” (** out of four) was a fairly conventional found-footage horror thriller about a group of YouTube bloggers (Riz Moritz, Ellie Duckles, Tori Butler-Hart, and others) who find themselves in a paranormal nightmare when they accidentally awaken a sinister occult from the past and find that all their lives are in danger. Plodding and dull for the first half but second half does provide some spookiness and scares although even these seem borrowed heavily from “The Blair Witch Project.” Title is Welsh for dagger, in case you were wondering.