`<iframe>` embeds are nearly ready for GA. See: * https://gitlab.com/gitlab-org/gitlab/-/issues/282443+ * https://gitlab.com/gitlab-org/gitlab/-/work_items/596742+ Remaining MRs: * https://gitlab.com/gitlab-org/gitlab/-/merge_requests/231411+s * https://gitlab.com/gitlab-org/gitlab/-/merge_requests/231412+s * https://gitlab.com/gitlab-org/gitlab/-/merge_requests/231827+s They are almost completely undocumented — there is some erroneously-placed documentation in the Markdown documentation under the JSON tables heading (!) here: <https://docs.gitlab.com/user/markdown/#json-tables>. Create a section for them (probably around video embeds), move that over there, complete the documentation according to the implementation, and get a TW to review! Note also https://gitlab.com/gitlab-org/gitlab/-/merge_requests/231827#note_3265139332 (staff-only). cc @brendan777