If you're using https://newsboat.org, you can add a filter (killfile) to remedy this:

  ignore-article "*" "title =~ \"#shorts\""
  ignore-article "*" "content =~ \"#shorts\""

Not perfect though, since it only ignores videos with hashtag '#shorts' in title or description and not all shorts includes that hashtag.

Does this still work? This post from a couple weeks ago was saying they were down. Was this a temporary outage, not a removal?

https://news.ycombinator.com/item?id=39179446

I like the idea of moving some of the channels I actually like to RSS.

Yes it still works, I use it daily. They have had a couple of instances of downtime in the last year, a lot more the Youtube itself, but still very reliable.

They removed the OPML export from the subscription manager unfortunately.

I'm subscribed to a YouTube playlist RSS feed and it last updated on Saturday.

Best as I can tell there is no difference between Shorts and full length videos when coming from the RSS feed. It even loads in the full player on the website when following the url.

The best I've come up with is to use youtube-dl to get the duration and if it's shorter then 60s drop the item.

I generally just use the thumbnail to quickly manually filter shorts. If the thumbnail is vertical it is 99% a short.

A few channels I subscribe to make interesting shorts so I keep them. But for everyone one else the delete key is very fast to press.

If you're possibly using Feedbin, I've been successfully using Feedbin's "Actions" to select for Shorts with the search field media_duration and then marking those items unter 60 seconds as read. That feature and the search syntax are a little bit hidden, but are worth it:

https://feedbin.com/help/search-syntax/