@ambihelical The ActivityPub object does have the tags:
$ curl -H "Accept: application/activity+json" https://spectra.video/videos/watch/abca8fe8-d068-4ce9-9d9e-402e4ba66244 | jq .tag[
{
"type": "Hashtag",
"name": "emacs"
},
{
"type": "Hashtag",
"name": "package-vc"
}
]
It seems the Mastodon instance I am on right now does display these in the post, perhaps that is a new feature?