Could be #IdoLinguo , #Interlingua ,
#TokiPona ... I feel like those are probably the next most popular constructed languages after Esperanto?

Ido Correlatives #2 - What (Ido Linguo)

https://spectra.video/w/nwg8ZkbDFbDEMhfyrG7cxq

Ido Correlatives #2 - What (Ido Linguo)

PeerTube

Ido Correlatives #1 - Who (Ido Linguo)

https://spectra.video/w/5EWQTEzW7u7yF2fJ421zQ9

Ido Correlatives #1 - Who (Ido Linguo)

PeerTube
Animalo Rejlando #1 (Ido)

PeerTube

History of the Ido Language, and a little about Esperanto (Ido)

https://spectra.video/w/vNL6VQ8kwkQZyFebcJ1AxM

History of the Ido Language, and a little about Esperanto (Ido)

PeerTube
Ido | Unesma Lektolibro: La garantio dal poeto

YouTube
Ido | Unesma Lektolibro: Sokrates ed Esopos

YouTube
Ido | Unesma Lektolibro: Eloquenteso di la signi

YouTube
Ido | Unesma Lektolibro: La nesto di buvrelo

YouTube
Ido | Unesma Lektolibro: La furtisto e la ciencisto

YouTube