README.md documentation error: CLI utility correct use. [BUG] [DOCUMENTATION ERROR]

[dpeachpeach]

Before creating an issue
I am running the latest version (15.0.0) from source. I am using fish-shell but I also reproduced this on zsh and bash.

Describe the bug

The current README.md on the Github repository has the command for downloading a youtube video via CLI as:

$ pytube https://youtube.com/watch?v=2lAe1cqCOXo

This returns a token error on zsh, bash, and fish. I was able to fix it by realizing that the URL must be fed into the CLI utility as a string. Thus the correct line in the README.md would be:

$ pytube "https://youtube.com/watch?v=2lAe1cqCOXo"

The playlist example also does not work, that URL should also be a string.

To Reproduce

$ pytube https://youtube.com/watch?v=2lAe1cqCOXo

Running this command using the latest version (15.0.0) without marking the URL as a string will return a tokenization error.

Expected behavior
I expected it to download the video (as per the documentation)

I will attach a PR to this issue that quickly fixes the README docs.

[github-actions]

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