when watching iptv on VLC Media Player most often it skips channels during playback of or streaming, it happens as VLC needs to “buffer” video files or video streams before it can play them. Although this problems is commonly associated with Internet streaming, you may also experience it while playing video files located in local disk. The easiest ways to fix this problem is to update your vlc player to the latest release and following the step demonstrated in the picture below.
another thing to keep in mind is to make sure you have a good and stable internet speed to enjoy watching without problems.