diff --git a/data/core.telegram.org/bots/api.html b/data/core.telegram.org/bots/api.html
index 2e771e47e4..9808c47616 100644
--- a/data/core.telegram.org/bots/api.html
+++ b/data/core.telegram.org/bots/api.html
@@ -1050,7 +1050,7 @@ To learn how to create…">
 <tr>
 <td>file_size</td>
 <td>Integer</td>
-<td><em>Optional</em>. File size</td>
+<td><em>Optional</em>. File size in bytes</td>
 </tr>
 </tbody>
 </table>
@@ -1108,7 +1108,7 @@ To learn how to create…">
 <tr>
 <td>file_size</td>
 <td>Integer</td>
-<td><em>Optional</em>. File size</td>
+<td><em>Optional</em>. File size in bytes</td>
 </tr>
 </tbody>
 </table>
@@ -1161,7 +1161,7 @@ To learn how to create…">
 <tr>
 <td>file_size</td>
 <td>Integer</td>
-<td><em>Optional</em>. File size</td>
+<td><em>Optional</em>. File size in bytes</td>
 </tr>
 <tr>
 <td>thumb</td>
@@ -1209,7 +1209,7 @@ To learn how to create…">
 <tr>
 <td>file_size</td>
 <td>Integer</td>
-<td><em>Optional</em>. File size</td>
+<td><em>Optional</em>. File size in bytes</td>
 </tr>
 </tbody>
 </table>
@@ -1267,7 +1267,7 @@ To learn how to create…">
 <tr>
 <td>file_size</td>
 <td>Integer</td>
-<td><em>Optional</em>. File size</td>
+<td><em>Optional</em>. File size in bytes</td>
 </tr>
 </tbody>
 </table>
@@ -1310,7 +1310,7 @@ To learn how to create…">
 <tr>
 <td>file_size</td>
 <td>Integer</td>
-<td><em>Optional</em>. File size</td>
+<td><em>Optional</em>. File size in bytes</td>
 </tr>
 </tbody>
 </table>
@@ -1348,7 +1348,7 @@ To learn how to create…">
 <tr>
 <td>file_size</td>
 <td>Integer</td>
-<td><em>Optional</em>. File size</td>
+<td><em>Optional</em>. File size in bytes</td>
 </tr>
 </tbody>
 </table>
@@ -1713,7 +1713,7 @@ To learn how to create…">
 <tr>
 <td>duration</td>
 <td>Integer</td>
-<td>Voice chat duration; in seconds</td>
+<td>Voice chat duration in seconds</td>
 </tr>
 </tbody>
 </table>
@@ -1785,7 +1785,7 @@ To learn how to create…">
 <tr>
 <td>file_size</td>
 <td>Integer</td>
-<td><em>Optional</em>. File size, if known</td>
+<td><em>Optional</em>. File size in bytes, if known</td>
 </tr>
 <tr>
 <td>file_path</td>
@@ -2910,7 +2910,7 @@ To learn how to create…">
 <tr>
 <td>duration</td>
 <td>Integer</td>
-<td><em>Optional</em>. Video duration</td>
+<td><em>Optional</em>. Video duration in seconds</td>
 </tr>
 <tr>
 <td>supports_streaming</td>
@@ -2973,7 +2973,7 @@ To learn how to create…">
 <tr>
 <td>duration</td>
 <td>Integer</td>
-<td><em>Optional</em>. Animation duration</td>
+<td><em>Optional</em>. Animation duration in seconds</td>
 </tr>
 </tbody>
 </table>
@@ -3103,7 +3103,7 @@ To learn how to create…">
 <p><strong>Sending by URL</strong></p>
 <ul>
 <li>When sending by URL the target file must have the correct MIME type (e.g., audio/mpeg for <a href="#sendaudio">sendAudio</a>, etc.).</li>
-<li>In <a href="#senddocument">sendDocument</a>, sending by URL will currently only work for <strong>gif</strong>, <strong>pdf</strong> and <strong>zip</strong> files.</li>
+<li>In <a href="#senddocument">sendDocument</a>, sending by URL will currently only work for <strong>GIF</strong>, <strong>PDF</strong> and <strong>ZIP</strong> files.</li>
 <li>To use <a href="#sendvoice">sendVoice</a>, the file must have the type audio/ogg and be no more than 1MB in size. 1-20MB voice notes will be sent as files.</li>
 <li>Other configurations may work but we can&#39;t guarantee that they will.</li>
 </ul>
@@ -5745,7 +5745,7 @@ pre-formatted fixed-width code block written in the Python programming language
 <tr>
 <td>file_size</td>
 <td>Integer</td>
-<td><em>Optional</em>. File size</td>
+<td><em>Optional</em>. File size in bytes</td>
 </tr>
 </tbody>
 </table>
@@ -6330,7 +6330,7 @@ pre-formatted fixed-width code block written in the Python programming language
 <tr>
 <td>photo_url</td>
 <td>String</td>
-<td>A valid URL of the photo. Photo must be in <strong>jpeg</strong> format. Photo size must not exceed 5MB</td>
+<td>A valid URL of the photo. Photo must be in <strong>JPEG</strong> format. Photo size must not exceed 5MB</td>
 </tr>
 <tr>
 <td>thumb_url</td>
@@ -6423,7 +6423,7 @@ pre-formatted fixed-width code block written in the Python programming language
 <tr>
 <td>gif_duration</td>
 <td>Integer</td>
-<td><em>Optional</em>. Duration of the GIF</td>
+<td><em>Optional</em>. Duration of the GIF in seconds</td>
 </tr>
 <tr>
 <td>thumb_url</td>
@@ -6506,7 +6506,7 @@ pre-formatted fixed-width code block written in the Python programming language
 <tr>
 <td>mpeg4_duration</td>
 <td>Integer</td>
-<td><em>Optional</em>. Video duration</td>
+<td><em>Optional</em>. Video duration in seconds</td>
 </tr>
 <tr>
 <td>thumb_url</td>
@@ -6587,7 +6587,7 @@ pre-formatted fixed-width code block written in the Python programming language
 <tr>
 <td>thumb_url</td>
 <td>String</td>
-<td>URL of the thumbnail (jpeg only) for the video</td>
+<td>URL of the thumbnail (JPEG only) for the video</td>
 </tr>
 <tr>
 <td>title</td>
@@ -6843,7 +6843,7 @@ pre-formatted fixed-width code block written in the Python programming language
 <tr>
 <td>thumb_url</td>
 <td>String</td>
-<td><em>Optional</em>. URL of the thumbnail (jpeg only) for the file</td>
+<td><em>Optional</em>. URL of the thumbnail (JPEG only) for the file</td>
 </tr>
 <tr>
 <td>thumb_width</td>
@@ -8500,7 +8500,7 @@ pre-formatted fixed-width code block written in the Python programming language
 <tr>
 <td>file_size</td>
 <td>Integer</td>
-<td>File size</td>
+<td>File size in bytes</td>
 </tr>
 <tr>
 <td>file_date</td>