Actually, they have been averaging 2-3 videos a month for a while now so this is not related to the election, but the steady stream we have become accostumed. No way near by comparaison to 2004's election video, the last appearance from UBL.
The fact it's from al Libi - an important preacher and recruiter - but certainly not who you'd think they would parade prior to the election. I expect another one, before Tuesday.
If none come, it might be a show of weakness and would give credance to the information that Pakistan Intelligence might have Zawahiri boxed in.