It seems the YouTube Data API v3 is missing the functionality to check whether a video id is a short. Another way to check whether it is a short is by checking the response code of the following public url: https://www.youtube.com/shorts/:videoId (303 = regular video, 200 = short), but this could easily result in ratelimits and if used on a worker node like Cloudflare workers, Google will flag the request as suspicious.
Is there another way to check whether a video is a short?