Why Is Link to Video Not Found by Brave Community Site?

[carla_rogers]

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Description of the issue:
I made a video to explain a question I hope someone here can answer.

Unfortunately, when I posted a link to the video, I got this disturbing message I cannot understand enough to resolve:

Steps to Reproduce (add as many as necessary): 1. 2. 3.
Post link to video and suffering is foretold by hateful message, “”

[carla_rogers]

When a url is posted to a directory, instead of a file, it creates the problem.

This does not work, even though the link leads to the video:

It produces this in the forum:

This works, because the url includes the complete path to the file displaying the video:

It produces this in the forum

This works