diff --git a/CHANGELOG.md b/CHANGELOG.md
index ac640f3..81dc91d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - New `--version` flag to display Zimit version
 - New `--logging` flag to adjust Browsertrix Crawler logging (#273)
 - Use new `--scraper-suffix` flag of warc2zim to enhance ZIM "Scraper" metadata (#275)
+- New `--noMobileDevice` CLI argument
 
 ### Changed
 
@@ -21,6 +22,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Adopt Python bootstrap conventions
 - Removed handling of redirects by zimit, they are handled by browsertrix crawler and detected properly by warc2zim
 - Upgrade to Python 3.12 + upgrade dependencies
+- `--userAgent` CLI argument overrides again the `--userAgentSuffix` and `--adminEmail` values
+- `--userAgent` CLI arguement is not mandatory anymore
+- Upgraded Browsertrix Crawler to 1.0.3
+
+### Fixed
+
+- Fix support for Youtube videos (#291)
 
 ## [1.6.3] - 2024-01-18
 
diff --git a/Dockerfile b/Dockerfile
index 53306f3..c1731d9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM webrecorder/browsertrix-crawler:1.0.0-beta.6
+FROM webrecorder/browsertrix-crawler:1.0.3
 LABEL org.opencontainers.image.source https://github.com/openzim/zimit
 
 # add deadsnakes ppa for Python 3.12 on Ubuntu Jammy
diff --git a/src/zimit/zimit.py b/src/zimit/zimit.py
index dbf3965..7c2764a 100755
--- a/src/zimit/zimit.py
+++ b/src/zimit/zimit.py
@@ -26,11 +26,6 @@
 
 from zimit.__about__ import __version__
 
-DEFAULT_USER_AGENT = (
-    "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 "
-    "(KHTML, like Gecko) Version/17.0 Safari/605.1.15"
-)
-
 EXIT_CODE_WARC2ZIM_CHECK_FAILED = 2
 EXIT_CODE_CRAWLER_LIMIT_HIT = 11
 NORMAL_WARC2ZIM_EXIT_CODE = 100
@@ -230,13 +225,21 @@ def run(raw_args):
         help="Emulate mobile device by name from "
         "https://github.com/puppeteer/puppeteer/blob/"
         "main/packages/puppeteer-core/src/common/Device.ts",
+        default="Pixel 2",
+    )
+
+    parser.add_argument(
+        "--noMobileDevice",
+        help="Do not emulate a mobile device (use at your own risk, behavior is"
+        "uncertain)",
+        action="store_true",
+        default=False,
     )
 
     parser.add_argument(
         "--userAgent",
-        help="Override default user-agent with specified value ; --userAgentSuffix is "
-        "still applied",
-        default=DEFAULT_USER_AGENT,
+        help="Override default user-agent with specified value ; --userAgentSuffix and "
+        "--adminEmail have no effect when this is set",
     )
 
     parser.add_argument(
@@ -367,7 +370,7 @@ def run(raw_args):
     except Exception:
         logger.error("Failed to get Browsertrix crawler version")
         raise
-    crawler_version = crawl.stdout
+    crawler_version = crawl.stdout.strip()
     logger.info(f"Browsertrix crawler: version {crawler_version}")
 
     # pass a scraper suffix to warc2zim so that both zimit, warc2zim and crawler
@@ -384,11 +387,9 @@ def run(raw_args):
 
     url = zimit_args.url
 
-    user_agent = zimit_args.userAgent
-    if zimit_args.userAgentSuffix:
-        user_agent += f" {zimit_args.userAgentSuffix}"
+    user_agent_suffix = zimit_args.userAgentSuffix
     if zimit_args.adminEmail:
-        user_agent += f" {zimit_args.adminEmail}"
+        user_agent_suffix += f" {zimit_args.adminEmail}"
 
     if url:
         url = get_cleaned_url(url)
@@ -443,8 +444,12 @@ def cleanup():
         cmd_args.append("--url")
         cmd_args.append(url)
 
-    cmd_args.append("--userAgent")
-    cmd_args.append(user_agent)
+    cmd_args.append("--userAgentSuffix")
+    cmd_args.append(user_agent_suffix)
+
+    if not zimit_args.noMobileDevice:
+        cmd_args.append("--mobileDevice")
+        cmd_args.append(zimit_args.mobileDevice)
 
     cmd_args.append("--cwd")
     cmd_args.append(str(temp_root_dir))
@@ -538,7 +543,7 @@ def get_node_cmd_line(args):
         "collection",
         "allowHashUrls",
         "lang",
-        "mobileDevice",
+        "userAgent",
         "useSitemap",
         "behaviors",
         "behaviorTimeout",
diff --git a/tests/test_dummy.py b/tests/test_dummy.py
index dd89067..54af094 100644
--- a/tests/test_dummy.py
+++ b/tests/test_dummy.py
@@ -1,6 +1,6 @@
-from zimit.zimit import DEFAULT_USER_AGENT
+from zimit.zimit import NORMAL_WARC2ZIM_EXIT_CODE
 
 
 # dummy test, just to have coverage report done
-def test_default_user_agent():
-    assert DEFAULT_USER_AGENT
+def test_something_exists():
+    assert NORMAL_WARC2ZIM_EXIT_CODE