Improved download fail backup method

backend/downloader.js

@@ -521,6 +521,8 @@ exports.generateArgs = async (url, type, options, user_uid = null, simulated = f
             downloadConfig.push('--write-thumbnail');
         }
 
+        downloadConfig.push('-i');
+
         if (globalArgs && globalArgs !== '') {
             // adds global args
             if (downloadConfig.indexOf('-o') !== -1 && globalArgs.split(',,').indexOf('-o') !== -1) {
@@ -571,8 +573,8 @@ exports.getVideoInfoByURL = async (url, args = [], download_uid = null) => {
     let {callback} = await youtubedl_api.runYoutubeDL(url, new_args);
     const {parsed_output, err} = await callback;
     if (!parsed_output || parsed_output.length === 0) {
-        let error_message = `Error while retrieving info on video with URL ${url} with the following message: ${err}`;
-        if (err.stderr) error_message += `\n\n${err.stderr}`;
+        let error_message = `Error while retrieving info on video with URL ${url}`;
+        if (err.stderr) error_message += ` with the following message: \n${err.stderr}`;
         logger.error(error_message);
         if (download_uid) {
             await handleDownloadError(download_uid, error_message, 'info_retrieve_failed');

backend/utils.js

@@ -529,7 +529,9 @@ exports.parseOutputJSON = (output, err) => {
     let split_output = [];
     // const output_jsons = [];
     if (err && !output) {
-        if (!err.stderr.includes('This video is unavailable') && !err.stderr.includes('Private video')) {
+        const attempt_backup_errs = ['This video is unavailable', 'Private video', 'unavailable video'];
+        const attempt_backup = err.stderr ? attempt_backup_errs.some(err_msg => err.stderr.includes(err_msg)) : false;
+        if (!attempt_backup) {
             return null;
         }
         logger.info('An error was encountered with at least one video, backup method will be used.')

backend/youtube-dl.js

@@ -67,7 +67,9 @@ const runYoutubeDLProcess = async (url, args, youtubedl_fork = config_api.getCon
             const parsed_output = utils.parseOutputJSON(stdout.trim().split(/\r?\n/), stderr);
             resolve({parsed_output, err: stderr});
         } catch (e) {
-            resolve({parsed_output: null, err: e})
+            // Attempt to not fail
+            const parsed_output = utils.parseOutputJSON(e && e.stdout && e.stdout.trim().split(/\r?\n/), e && e.stderr);
+            resolve({parsed_output: parsed_output, err: parsed_output ? null : e});
         }
     });
     return {child_process, callback}