api: flatten code directories, better filenames, remove old files

api/src/processing/services/streamable.js

@@ -0,0 +1,22 @@
+export default async function(obj) {
+    let video = await fetch(`https://api.streamable.com/videos/${obj.id}`)
+                      .then(r => r.status === 200 ? r.json() : false)
+                      .catch(() => {});
+
+    if (!video) return { error: 'ErrorEmptyDownload' };
+
+    let best = video.files['mp4-mobile'];
+    if (video.files.mp4 && (obj.isAudioOnly || obj.quality === "max" || obj.quality >= 720)) {
+        best = video.files.mp4;
+    }
+
+    if (best) return {
+        urls: best.url,
+        filename: `streamable_${obj.id}_${best.width}x${best.height}.mp4`,
+        audioFilename: `streamable_${obj.id}_audio`,
+        fileMetadata: {
+            title: video.title
+        }
+    }
+    return { error: 'ErrorEmptyDownload' }
+}