I was having some trouble converting a TV recording in MKV to MP4. I followed this guide on AfterDawn (http://www.afterdawn.com/guides/archive/convert_mkv_to_files_for_play_on_iphone_ipod_t...per_page_3.cfm) which uses SUPER to convert the video. When I loaded it into iTunes, it does play. But when I try syncing it to my iPhone, it says it cannot be synced b/c the movie cannot be played on the iPhone. Are there any restrictions I need to look out for in trying to play video on my iPhone? Thanks!