Correct extensions for video uploads (missing period at beginning)

pkg/gcutil/util.go

@@ -145,17 +145,19 @@ func GetThumbnailExt(filename string) string {
 	switch ext {
 	case ".gif":
 		fallthrough
+	case ".mp4":
+		fallthrough
 	case ".png":
 		fallthrough
 	case ".webm":
 		fallthrough
 	case ".webp":
 		return "png"
+	case ".jfif":
+		fallthrough
 	case ".jpg":
 		fallthrough
 	case ".jpeg":
-		fallthrough
-	case "mp4":
 		return "jpg"
 	default:
 		// invalid file format

pkg/posting/uploads.go

@@ -105,7 +105,7 @@ func AttachUploadFromRequest(request *http.Request, writer http.ResponseWriter,
 			Msg("Recovered from a panic in event handler")
 	}
 
-	if ext == "webm" || ext == "mp4" {
+	if ext == ".webm" || ext == ".mp4" {
 		infoEv.Str("post", "withVideo").
 			Str("filename", handler.Filename).
 			Str("referer", request.Referer()).Send()