the list of apps:
freeview://
bbciplayer://
itvplayer://
all4://
my5://
uktvplay://
stv-player://
cbscatchup://
some examples:
bbciplayer://www.bbc.co.uk/iplayer/mobile/channels/bbc_one
bbciplayer://www.bbc.co.uk/iplayer/mobile/channels/bbc_three
bbciplayer://www.bbc.co.uk/iplayer/mobile/channels/cbeebies
bbciplayer://www.bbc.co.uk/iplayer/mobile/channels/bbc_news24
bbciplayer://www.bbc.co.uk/iplayer/mobile/channels/bbc_parliament
all4://views/on-now?channel=E4
all4://views/on-now?channel=F4
all4://views/on-now?channel=M4
all4://views/on-now?channel=4s #4seven
itvplayer://freeview_app/simulcast/itv
itvplayer://freeview_app/simulcast/itv2
itvplayer://freeview_app/simulcast/itv4
itvplayer://freeview_app/simulcast/itvbe
my5://watch/C5 #5
my5://watch/C7 #5USA
my5://watch/C6 #5STAR
my5://watch/C0 #5ACTION
my5://watch/C8 #5SELECT
the on-demand ones look like:
uktvplay://video/LDXA899W
cbscatchup://show/45036278
https://player.stv.tv/episode/210327
bbciplayer://www.bbc.co.uk/iplayer/mobile/episode/m0012vh3
all4://views/brands?brand=attack-the-block&programme=43601-001
itvplayer://freeview_app/play/1_8812_0001.005