[Video] Download videos (#4886)

Co-authored-by: Samuel Newman <10959775+mozzius@users.noreply.github.com>

modules/expo-bluesky-swiss-army/ios/HLSDownload/ExpoHLSDownloadModule.swift

@@ -0,0 +1,31 @@
+import ExpoModulesCore
+
+public class ExpoHLSDownloadModule: Module {
+  public func definition() -> ModuleDefinition {
+    Name("ExpoHLSDownload")
+
+    Function("isAvailable") {
+      if #available(iOS 14.5, *) {
+        return true
+      }
+      return false
+    }
+
+    View(HLSDownloadView.self) {
+      Events([
+        "onStart",
+        "onError",
+        "onProgress",
+        "onSuccess"
+      ])
+
+      Prop("downloaderUrl") { (view: HLSDownloadView, downloaderUrl: URL) in
+        view.downloaderUrl = downloaderUrl
+      }
+
+      AsyncFunction("startDownloadAsync") { (view: HLSDownloadView, sourceUrl: URL) in
+        view.startDownload(sourceUrl: sourceUrl)
+      }
+    }
+  }
+}