From b2evolution manual

Hi

 I've seen the videos with id, starting with "p" do not work. I apologize for my English.
    Regards

[edit] ":p" renders as emoticon

Same problem here. i've one vid that starts with a 'p' and it just wont show.

What worked for me was uninstalling the smiley plug in. I dont need them, but i need video so not a diffcult decision.

Don't know if you then reinstall the smiley plug in it might work?

Walk Eryri