render frames as series of uncompressed tiff images. convert series of images to an uncompressed movie in yer video editor. concatenate the separate uncompressed videos in the correct order. at that point, conversion to some compressed format is fraught with difficulties, as some clients will be unable to view yer movie, regardless of what codec ya use. so ya should ask yer clients what codec they like. if that's impossible, then use something popular like divx (cross-platform) or wmv3 (usually not cross-platform). as I understand it, anything ya upload to youtube will be converted to flash, so that eliminates any worries there :lol: