I remember watching one of OU's Pesach webinars a few years back where Rav Belsky was asked what is the proper way to lean at the seder. Rav Belsky answered that based off an ancient (Roman) tapestry which depicts people leaning, all one has to do is prop his left hand on the table and place his head in a slightly slanted postion in his hand (he illustrated how to do it). I am looking for this video everywhere, and I even asked OU where this video is and they don't know where it is. Does anyone know where to find this video?
A picture probably similar to what Rav Belsky saw (maybe even the exact one, not sure):
Mosaic of a Symposium with Asarotos Oikos. Photo: Phoenix Ancient Art.