If multiple videos exist in one URL, a playlist will be auto generated

Removed tomp3 and tomp4 routes, replaced with /downloadFile

Simplified category->playlist conversion

Simplified playlist creation

Simplified file deletion

Playlist duration calculation is now done on the backend (categories uses this now too)

removeIDFromArchive moved from subscriptions->utils

Added plumbing to support type agnostic playlists

src/app/components/recent-videos/recent-videos.component.ts

@@ -221,7 +221,7 @@ export class RecentVideosComponent implements OnInit {
 
       if (!this.postsService.config.Extra.file_manager_enabled) {
         // tell server to delete the file once downloaded
-        this.postsService.deleteFile(name, type).subscribe(delRes => {
+        this.postsService.deleteFile(file.uid).subscribe(delRes => {
           // reload mp4s
           this.getAllFiles();
         });