This vaad on Tefillah is given in Yeshiva Gedolah of Greater Washington. In the first few vaadim, R’ Aaron goes through some fundamental concepts of tefillah. Afterwards, he begins to go through the actual siddur (beginning with Shemonah Esrei and working his way backwards).
Although cutoff by Covid-19, this is an ongoing vaad which will hopefully resume very soon. So make sure to subscribe to get the latest vaadim as they are published.