In Drupal 9, I have a View called News.

The View is displayed at the following path:

/news

I can edit it at the following path:

/admin/structure/views/view/news/edit

It has the following Contextual filter:

Content datasource: Content type

The contextual filter values are provided by the URL.

When the filter value is NOT in the URL: Provide default value

Type: Fixed

Fixed value: all

Exception value: all

If this value is received, the filter will be ignored; i.e, "all values"

This works well for content types like article and blog_post.

When the View is displayed for the path /news/article, the contextual filter shows only Content type article.

When the View is displayed for the path /news/blog_post, the contextual filter shows only Content type blog_post.

So far, so good.

Now, the client has a custom content type called "Youtube Video" with machine name youtube_video.

When this View is displayed for the path /news/youtube_video. the contextual filter shows only Content type youtube_video.

But the client wants the path to be /news/video.

What are my options?

Some constraints:

• The client definitely wants the path to be /news/video, and not something like /news?type=video.
• I don’t think that it’s trivial to match /news/foo and substitute bar for foo as the input for a contextual filter.
• I know how to use positional parameters in a route, but I don’t think I can easily override the route for just /news/foo while preserving the contextual filter as it is for the other content types.

Some flexibility:

• The Drupal 9 site is brand new, and I’m about to migrate the content from Drupal 7 via Migrate API, so it’s possible to change the machine name of the youtube_video content type to video during the migration. Then this View would work without modification. (The problem would be figuring out everything else that references the machine name youtube_video and changing that to video also — potentially a lot of effort.)
• It may be possible to alter the query parameters conditionally using hook_views_pre_view() or hook_views_query_alter(), but I only want to do this if a specific parameter is matched.