Silas V on Nostr: I remember there being a thing where you put just embedded youtube videos into a ...

I remember there being a thing where you put just embedded youtube videos into a podcast feed. Was that in the alternate enclosure?
Some player supported that I think. At least one. Naturally I have to think it was npub10fp3ehl8utp98zgk6lx87uwkfxm9zq6z9varapeuluz9cdf3zfvs94qqev (npub10fp…qqev)
or am I misremembering