Invalid URL protocol

[omitewary]

it says invalid URL protocol.the command line shows following output
ERROR: Invalid URL protocol; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.

I tried to update it but it says you have downloaded wwith a package manager tarball or pip and have to use the same to update.
how do i fix this issue?

[youtube:search] query "-": Downloading page 1
[download] Downloading playlist: -
[youtube:search] playlist -: Collected 1 video ids (downloading 1 of them)
[download] Downloading video #1 of 1
[youtube] Setting language
[youtube] RYV1l4sPljs: Downloading webpage
[youtube] RYV1l4sPljs: Downloading video info webpage
[youtube] RYV1l4sPljs: Extracting video information
[download] Destination: How to use Hyphen ( - ) correctly - English Grammar _ writing lesson-RYV1l4sPljs.mp4
[download] 100% of 96.80MiB in 24:58
[generic] watch?v=3oQNyQpa_iM: Requesting header

[phihag]

It looks like something has been garbled in your bug report. Can you show us the command line that led to the problem, or the full output with the --verbose switch? This should allow us to help you with your first problem, the invalid URL protocol error.

About not being able to update: How did you install youtube-dl? If you used a package manager, use your package manager to update it. Alternatively, uninstall your package manager's version of youtube-dl and follow the manual installation instructions:

sudo apt-get remove -y youtube-dl
sudo wget https://yt-dl.org/latest/youtube-dl -O /usr/local/bin/youtube-dl
sudo chmod a+rx /usr/local/bin/youtube-dl
hash -r  # Optional

The third and final output looks fine to me, with the exception of the final line. What did you run there? What did you expect?