diff --git a/.github/ISSUE_TEMPLATE.md b/.github/ISSUE_TEMPLATE.md
index 650f78511..841bca914 100644
--- a/.github/ISSUE_TEMPLATE.md
+++ b/.github/ISSUE_TEMPLATE.md
@@ -6,8 +6,8 @@
 
 ---
 
-### Make sure you are using the *latest* version: run `youtube-dl --version` and ensure your version is *2019.01.16*. If it's not, read [this FAQ entry](https://github.com/rg3/youtube-dl/blob/master/README.md#how-do-i-update-youtube-dl) and update. Issues with outdated version will be rejected.
-- [ ] I've **verified** and **I assure** that I'm running youtube-dl **2019.01.16**
+### Make sure you are using the *latest* version: run `youtube-dl --version` and ensure your version is *2019.01.17*. If it's not, read [this FAQ entry](https://github.com/rg3/youtube-dl/blob/master/README.md#how-do-i-update-youtube-dl) and update. Issues with outdated version will be rejected.
+- [ ] I've **verified** and **I assure** that I'm running youtube-dl **2019.01.17**
 
 ### Before submitting an *issue* make sure you have:
 - [ ] At least skimmed through the [README](https://github.com/rg3/youtube-dl/blob/master/README.md), **most notably** the [FAQ](https://github.com/rg3/youtube-dl#faq) and [BUGS](https://github.com/rg3/youtube-dl#bugs) sections
@@ -36,7 +36,7 @@ Add the `-v` flag to **your command line** you run youtube-dl with (`youtube-dl
 [debug] User config: []
 [debug] Command-line args: [u'-v', u'http://www.youtube.com/watch?v=BaW_jenozKcj']
 [debug] Encodings: locale cp1251, fs mbcs, out cp866, pref cp1251
-[debug] youtube-dl version 2019.01.16
+[debug] youtube-dl version 2019.01.17
 [debug] Python version 2.7.11 - Windows-2003Server-5.2.3790-SP2
 [debug] exe versions: ffmpeg N-75573-g1d0487f, ffprobe N-75573-g1d0487f, rtmpdump 2.4
 [debug] Proxy map: {}
diff --git a/ChangeLog b/ChangeLog
index 13019bf2b..902301765 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+version 2019.01.17
+
+Extractors
+* [youtube] Extend JS player signature function name regular expressions
+  (#18890, #18891, #18893)
+
+
 version 2019.01.16
 
 Core
diff --git a/youtube_dl/extractor/vimeo.py b/youtube_dl/extractor/vimeo.py
index 5e15f060b..3415ca597 100644
--- a/youtube_dl/extractor/vimeo.py
+++ b/youtube_dl/extractor/vimeo.py
@@ -1,6 +1,7 @@
 # coding: utf-8
 from __future__ import unicode_literals
 
+import base64
 import json
 import re
 import itertools
@@ -352,6 +353,7 @@ class VimeoIE(VimeoBaseInfoExtractor):
                 'timestamp': 1324343742,
                 'upload_date': '20111220',
                 'description': 'md5:ae23671e82d05415868f7ad1aec21147',
+                'view_count': int,
             },
         },
         {
@@ -392,6 +394,22 @@ class VimeoIE(VimeoBaseInfoExtractor):
                 'skip_download': True,
             },
         },
+        {
+            'url': 'http://player.vimeo.com/video/68375962',
+            'md5': 'aaf896bdb7ddd6476df50007a0ac0ae7',
+            'info_dict': {
+                'id': '68375962',
+                'ext': 'mp4',
+                'title': 'youtube-dl password protected test video',
+                'uploader_url': r're:https?://(?:www\.)?vimeo\.com/user18948128',
+                'uploader_id': 'user18948128',
+                'uploader': 'Jaime Marquínez Ferrándiz',
+                'duration': 10,
+            },
+            'params': {
+                'videopassword': 'youtube-dl',
+            },
+        },
         {
             'url': 'http://vimeo.com/moogaloop.swf?clip_id=2539741',
             'only_matching': True,
@@ -452,7 +470,9 @@ class VimeoIE(VimeoBaseInfoExtractor):
         password = self._downloader.params.get('videopassword')
         if password is None:
             raise ExtractorError('This video is protected by a password, use the --video-password option')
-        data = urlencode_postdata({'password': password})
+        data = urlencode_postdata({
+            'password': base64.b64encode(password.encode()),
+        })
         pass_url = url + '/check-password'
         password_request = sanitized_Request(pass_url, data)
         password_request.add_header('Content-Type', 'application/x-www-form-urlencoded')
@@ -622,12 +642,17 @@ class VimeoIE(VimeoBaseInfoExtractor):
                 'timestamp', default=None)
 
         try:
-            view_count = int(self._search_regex(r'UserPlays:(\d+)', webpage, 'view count'))
+            # When userInteractionCount does not exist views is 0
+            view_count = int_or_none(
+                self._search_regex(
+                    r'"interactionType":"http:\/\/schema\.org\/WatchAction","userInteractionCount":(.+?)}',
+                    webpage, 'view count', default=0
+                )
+            )
             like_count = int(self._search_regex(r'UserLikes:(\d+)', webpage, 'like count'))
             comment_count = int(self._search_regex(r'UserComments:(\d+)', webpage, 'comment count'))
         except RegexNotFoundError:
             # This info is only available in vimeo.com/{id} urls
-            view_count = None
             like_count = None
             comment_count = None
 
diff --git a/youtube_dl/extractor/youtube.py b/youtube_dl/extractor/youtube.py
index 730935657..c8bf98b58 100644
--- a/youtube_dl/extractor/youtube.py
+++ b/youtube_dl/extractor/youtube.py
@@ -1198,8 +1198,8 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
         funcname = self._search_regex(
             (r'(["\'])signature\1\s*,\s*(?P<sig>[a-zA-Z0-9$]+)\(',
              r'\.sig\|\|(?P<sig>[a-zA-Z0-9$]+)\(',
-             r'yt\.akamaized\.net/\)\s*\|\|\s*.*?\s*c\s*&&\s*d\.set\([^,]+\s*,\s*(?P<sig>[a-zA-Z0-9$]+)\(',
-             r'\bc\s*&&\s*d\.set\([^,]+\s*,\s*(?P<sig>[a-zA-Z0-9$]+)\(',
+             r'yt\.akamaized\.net/\)\s*\|\|\s*.*?\s*c\s*&&\s*d\.set\([^,]+\s*,\s*(?:encodeURIComponent\s*\()?(?P<sig>[a-zA-Z0-9$]+)\(',
+             r'\bc\s*&&\s*d\.set\([^,]+\s*,\s*(?:encodeURIComponent\s*\()?\s*(?P<sig>[a-zA-Z0-9$]+)\(',
              r'\bc\s*&&\s*d\.set\([^,]+\s*,\s*\([^)]*\)\s*\(\s*(?P<sig>[a-zA-Z0-9$]+)\('),
             jscode, 'Initial JS player signature function name', group='sig')
 
diff --git a/youtube_dl/version.py b/youtube_dl/version.py
index edbbb6f3d..362265964 100644
--- a/youtube_dl/version.py
+++ b/youtube_dl/version.py
@@ -1,4 +1,5 @@
 from __future__ import unicode_literals
 
-__version__ = 'vc.2019.01.16.1'
+
+__version__ = 'vc.2019.01.17'