I don't use VLC.
I can give you an overview how to use it, I use mplayer.
Same idea for any other player.
Make sure that you have software support for the device.
dmesg | tail
[73892.944851] dvb-usb: Pinnacle PCTV HD USB Stick successfully initialized and connected.
[73892.945193] usbcore: registered new interface driver dvb_usb_dib0700
Then scan for channels from a channel list. An example for ATSC OTA
Take the output of that and make a ~/.mplayer/channels.conf
Play a channel with
Then use the h and k keys to move through the channels.
So you'll need a working tuner, software support on your machine for it, scan for channels to make a channel list for the player, use a player to play a channel.