diff --git a/manager/ytsync.go b/manager/ytsync.go
index 8f73ec1..1a5ed45 100644
--- a/manager/ytsync.go
+++ b/manager/ytsync.go
@@ -649,7 +649,7 @@ func (s *Sync) startWorker(workerNum int) {
 			if err != nil {
 				logMsg := fmt.Sprintf("error processing video %s: %s", v.ID(), err.Error())
 				log.Errorln(logMsg)
-				if strings.Contains(err.Error(), "interrupted by user") {
+				if strings.Contains(strings.ToLower(err.Error()), "interrupted by user") {
 					return
 				}
 				fatalErrors := []string{
@@ -885,6 +885,7 @@ func (s *Sync) processVideo(v video) (err error) {
 		"Unable to extract signature tokens",
 		"the video is too big to sync, skipping for now",
 		"video is too long to process",
+		"This video contains content from",
 		"no compatible format available for this video",
 		"Watch this video on YouTube.",
 		"have blocked it on copyright grounds",
diff --git a/sources/youtubeVideo.go b/sources/youtubeVideo.go
index 61d7a01..ac25c9c 100644
--- a/sources/youtubeVideo.go
+++ b/sources/youtubeVideo.go
@@ -198,7 +198,7 @@ func (v *YoutubeVideo) download(useIPv6 bool) error {
 		"--match-filter",
 		fmt.Sprintf("duration <= %d", int(math.Round(v.maxVideoLength*3600))),
 		"-fbestvideo[ext=mp4][height<=1080]+bestaudio[ext!=webm]",
-		"-o" + strings.TrimRight(v.getFullPath(), ".mp4"),
+		"-o" + strings.TrimSuffix(v.getFullPath(), ".mp4"),
 		"--merge-output-format",
 		"mp4",
 	}
@@ -229,7 +229,7 @@ func (v *YoutubeVideo) download(useIPv6 bool) error {
 			sourceAddress,
 		)
 	} else {
-		log.Infoln("using IPv4: %s", sourceAddress)
+		log.Infof("using IPv4: %s", sourceAddress)
 		ytdlArgs = append(ytdlArgs,
 			"-4",
 			"--source-address",