diff --git a/src/constants.py b/src/constants.py
index 054ddf3..ecb4237 100644
--- a/src/constants.py
+++ b/src/constants.py
@@ -12,14 +12,15 @@
 
 EPOCH_DATE = datetime.datetime(1970, 1, 1)
 
-MAX_PHOTO_FILESIZE_UPLOAD = int(10E6)  # (50 MB)
 MAX_VIDEO_NOTE_LENGTH = 60
+MAX_VIDEO_NOTE_SIZE = 638
 
 AUDIO_CODEC_NAMES = ['aac', 'mp3']
 
 VIDEO_CODEC_NAMES = ['h264', 'hevc', 'mpeg4', 'vp6', 'vp8']
-VIDEO_NOTE_CROP_OFFSET_PARAMS = 'abs(in_w-in_h)/2'
-VIDEO_NOTE_CROP_SIZE_PARAMS = 'min(in_w,in_h)'
+VIDEO_NOTE_CROP_HORIZONTAL_OFFSET_PARAMS = 'abs(in_w - min(min(in_w, in_h), {})) / 2'.format(MAX_VIDEO_NOTE_SIZE)
+VIDEO_NOTE_CROP_VERTICAL_OFFSET_PARAMS = 'abs(in_h - min(min(in_w, in_h), {})) / 2'.format(MAX_VIDEO_NOTE_SIZE)
+VIDEO_NOTE_CROP_SIZE_PARAMS = 'min(min(in_w, in_h), {})'.format(MAX_VIDEO_NOTE_SIZE)
 
 
 class OutputType:
diff --git a/src/main.py b/src/main.py
index de85119..5916fd7 100755
--- a/src/main.py
+++ b/src/main.py
@@ -406,7 +406,7 @@ def message_file_handler(update: telegram.Update, context: telegram.ext.Callback
 
             return
         elif output_type == constants.OutputType.PHOTO:
-            if not utils.ensure_size_under_limit(output_file_size, constants.MAX_PHOTO_FILESIZE_UPLOAD, update, context, file_reference_text='Converted file'):
+            if not utils.ensure_size_under_limit(output_file_size, telegram.constants.MAX_PHOTOSIZE_UPLOAD, update, context, file_reference_text='Converted file'):
                 return
 
             bot.send_photo(
diff --git a/src/utils.py b/src/utils.py
index 0f72ca7..4739102 100644
--- a/src/utils.py
+++ b/src/utils.py
@@ -171,8 +171,8 @@ def convert(output_type: str, input_video_url: typing.Optional[str] = None, inpu
                 ffmpeg_input
                     .video
                     .crop(
-                        constants.VIDEO_NOTE_CROP_OFFSET_PARAMS,
-                        constants.VIDEO_NOTE_CROP_OFFSET_PARAMS,
+                        constants.VIDEO_NOTE_CROP_HORIZONTAL_OFFSET_PARAMS,
+                        constants.VIDEO_NOTE_CROP_VERTICAL_OFFSET_PARAMS,
                         constants.VIDEO_NOTE_CROP_SIZE_PARAMS,
                         constants.VIDEO_NOTE_CROP_SIZE_PARAMS
                     )