If the LG TV is visible to other devices on the network, such as the PC, you should see it within "Media Devices" under "Network" in the Windows File Explorer.

If you have an MPEG-4 (.mp4) or Audio Video Interleave (.avi) file on the PC, you can right-click on video file, then choose "Show more options," and then choose "Cast to Device" at which point you should see the LG TV as a device to which you can stream the video.

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Many—but not all—live-streamed programs are recorded. We understand it's not always possible to watch a program in real time, and as a courtesy to ticket buyers we are glad to make recordings available within 24 hours after the program has taken place. The recordings can be viewed for up to three days (72 hours) after they become available.

SmithSonian Associates has stated that they don't have sufficient storage space to make the recordings permanently available. If you can't watch the recording within the 3 days it will be available or want to have a permanent copy available for future reference, you can take the steps listed below to download an MP4 file of the recorded presentation.

If you click on the Watch button from your Encores page on the Smithsonian Associates website, you will be taken to a Zoom webpage. You can watch the video from that page, but if you right-click on the video, you will not see any option to save it. So you need to install a browser extension that will enable right-clicks to work on pages where they have been disabled.

Note: the instructions below are specifically for the Brave browser on a Microsoft Windows system, but the procedure for other browsers is likely to be similar.

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Related articles

1. Downloading Video Clips with Offliberty
   Date: January 26, 2014

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I verified I had the latest version of the program, 2021.12.17.

$ youtube-dl --version
2021.12.17
$

To obtain further information on the error, I then ran the script with the --verbose option which showed me more details on the error.

The software, which is a command-line program to download videos from YouTube.com and other video sites, is maintained by ytdl-org and, on a Github webpage for the organization, I found issue #32247, ERROR: Unable to extract uploader id, which attributed the error to YouTube recently starting to add that "at sign", i.e., @, to URLs. jgmayer, who posted his comments and the solution just 3 hours before I encountered the problem, posted the following solution:

The solution is to go to the file that you getting the error:
"/usr/local/Cellar/youtube-dl/2021.12.17/libexec/lib/python3.10/site-packages/youtube_dl/extractor/common.py"

Find the following line:

'uploader_id': self._search_regex(r'/(?:channel|user)/([^/?&#]+)', owner_profile_url, 'uploader id') if owner_profile_url else None,

Replace with the following:

'uploader_id': self._search_regex(r'/(?:channel/|user/|@)([^/?&#]+)', owner_profile_url, 'uploader id', default=None),

The poster indicated the relevant file is /usr/local/Cellar/youtube-dl/2021.12.17/libexec/lib/python3.10/site-packages/youtube_dl/extractor/common.py, but there is no /usr/local/Cellar directory on my system and running the script with the verbose option, showed the relevant code is on line 1,794 of /usr/local/lib/python3.6/site-packages/youtube_dl/extractor/youtube.py.

After making the suggested change, I was able to download a YouTube video with the program.

$ youtube-dl https://www.youtube.com/watch?v=JmSmjDngVXM
[youtube] JmSmjDngVXM: Downloading webpage
[download] Destination: Ancient Greek Lesson #1 _ Learn Greek Fast Online-JmSmjDngVXM.mp4
[download] 100% of 14.88MiB in 04:20
$

The updated youtube.py that can be used to replace the 2021.12.17 version in /usr/local/lib/python3.6/site-packages/youtube_dl/extractor/youtube.py.

References:

1. ERROR: Unable to extract uploader id #32247
   By: jgmayer
   Date: May 29, 2023
   Github - ytdl-org / youtube-dl

Related Articles:

1. Python script to download YouTube videos on Mac OS X

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1. Right-click on the video in Panoptoo—you may need to click on the small video in the upper, left-hand side of the window rather than the one on the right side of the window—and select "Inspect Element (Q)." In the "Search HTML" field, type .mp4 and hit Enter—this presumes the video is an MP4 video.
2. You should see the area in the HTML code where the MP4 file is referenced highlighted. Right-click on the highlighted area and choose "Copy" then "Outer HTML."
3. Then paste the information copied into the clipboard into Microsoft Notepad or some other text editor, depending on your operating system and preferred editor. You should see the URL for the video listed in the content pasted into the editor. Copy the URL starting with the "https" up through the ".mp4"—don't copy the information after the ".mp4."
4. Paste the copied URL into a browser tab. You can then right-click on the video in that browser tab and select "Save Video As" to download the video to your local system. You can give the video a more meaningful name than the long string of hexadecimal digits used for the name.

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For a Mac OS X system, you can obtain the script using the curl utility that is provided with the operating system. You can also use curl on a Linux system, if you have it installed on that system. Alternatively, you can use wget, which isn't provided with the OS X system, but which you may have on a Linux system, if you don't have curl available. To obtain the youtube-dl script using curl on a Mac OS X system, you can open a Terminal window and issue the command sudo curl -L https://yt-dl.org/downloads/latest/youtube-dl -o /usr/local/bin/youtube-dl. That will download the script and place it in the /usr/local/bin directory.

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