Here is a list of valid choices for the card=<n> insmod option:
card=0 -> Unknown EM2800 video grabber
card=1 -> Unknown EM2750/28xx video grabber
card=2 -> Terratec Cinergy 250 USB
card=3 -> Pinnacle PCTV USB 2
card=4 -> Hauppauge WinTV USB 2
card=5 -> MSI VOX USB 2.0
card=6 -> Terratec Cinergy 200 USB
card=7 -> Leadtek Winfast USB II
card=8 -> Kworld USB2800
card=9 -> Pinnacle Dazzle DVC 90/100/101/107
card=10 -> Hauppauge WinTV HVR 900
card=11 -> Terratec Hybrid XS
card=12 -> Kworld PVR TV 2800 RF
card=13 -> Terratec Prodigy XS
card=14 -> SIIG AVTuner-PVR / Pixelview Prolink PlayTV USB 2.0
card=15 -> V-Gear PocketTV
card=16 -> Hauppauge WinTV HVR 950
card=17 -> Pinnacle PCTV HD Pro Stick
card=18 -> Hauppauge WinTV HVR 900 (R2)
card=19 -> EM2860/SAA711X Reference Design
card=20 -> AMD ATI TV Wonder HD 600
card=21 -> eMPIA Technology, Inc. GrabBeeX+ Video Encoder
card=22 -> EM2710/EM2750/EM2751 webcam grabber
card=23 -> Huaqi DLCW-130
card=24 -> D-Link DUB-T210 TV Tuner
card=25 -> Gadmei UTV310
card=26 -> Hercules Smart TV USB 2.0
card=27 -> Pinnacle PCTV USB 2 (Philips FM1216ME)
card=28 -> Leadtek Winfast USB II Deluxe
card=29 -> EM2860/TVP5150 Reference Design
card=30 -> Videology 20K14XUSB USB2.0
card=31 -> Usbgear VD204v9
card=32 -> Supercomp USB 2.0 TV
card=33 -> Elgato Video Capture
card=34 -> Terratec Cinergy A Hybrid XS
card=35 -> Typhoon DVD Maker
card=36 -> NetGMBH Cam
card=37 -> Gadmei UTV330
card=38 -> Yakumo MovieMixer
card=39 -> KWorld PVRTV 300U
card=40 -> Plextor ConvertX PX-TV100U
card=41 -> Kworld 350 U DVB-T
card=42 -> Kworld 355 U DVB-T
card=43 -> Terratec Cinergy T XS
card=44 -> Terratec Cinergy T XS (MT2060)
card=45 -> Pinnacle PCTV DVB-T
card=46 -> Compro, VideoMate U3
card=47 -> KWorld DVB-T 305U
card=48 -> KWorld DVB-T 310U
card=49 -> MSI DigiVox A/D
card=50 -> MSI DigiVox A/D II
card=51 -> Terratec Hybrid XS Secam
card=52 -> DNT DA2 Hybrid
card=53 -> Pinnacle Hybrid Pro
card=54 -> Kworld VS-DVB-T 323UR
card=55 -> Terratec Cinnergy Hybrid T USB XS (em2882)
card=56 -> Pinnacle Hybrid Pro (330e)
card=57 -> Kworld PlusTV HD Hybrid 330
card=58 -> Compro VideoMate ForYou/Stereo
card=59 -> Pinnacle PCTV HD Mini
card=60 -> Hauppauge WinTV HVR 850
card=61 -> Pixelview PlayTV Box 4 USB 2.0
card=62 -> Gadmei TVR200
card=63 -> Kaiomy TVnPC U2
card=64 -> Easy Cap Capture DC-60
card=65 -> IO-DATA GV-MVP/SZ
card=66 -> Empire dual TV
card=67 -> Terratec Grabby
card=68 -> Terratec AV350
card=69 -> KWorld ATSC 315U HDTV TV Box
card=70 -> Evga inDtube
card=71 -> Silvercrest Webcam 1.3mpix
card=72 -> Gadmei UTV330+
card=73 -> Reddo DVB-C USB TV Box
card=74 -> Actionmaster/LinXcel/Digitus VC211A
card=75 -> Dikom DK300
card=76 -> KWorld PlusTV 340U or UB435-Q (ATSC)
card=77 -> EM2874 Leadership ISDBT
card=78 -> PCTV nanoStick T2 290e
card=79 -> Terratec Cinergy H5
card=80 -> PCTV DVB-S2 Stick (460e)
card=81 -> Hauppauge WinTV HVR 930C
card=82 -> Terratec Cinergy HTC Stick
card=83 -> Honestech Vidbox NW03
card=84 -> MaxMedia UB425-TC
card=85 -> PCTV QuatroStick (510e)
card=86 -> PCTV QuatroStick nano (520e)
card=87 -> Terratec Cinergy HTC USB XS
card=88 -> C3 Tech Digital Duo HDTV/SDTV USB
card=89 -> Delock 61959
card=90 -> KWorld USB ATSC TV Stick UB435-Q V2
card=91 -> SpeedLink Vicious And Devine Laplace webcam
card=92 -> PCTV DVB-S2 Stick (461e)
card=93 -> KWorld USB ATSC TV Stick UB435-Q V3
card=94 -> PCTV tripleStick (292e)
card=95 -> Leadtek VC100
card=96 -> Terratec Cinergy T2 Stick HD
card=97 -> Elgato EyeTV Hybrid 2008 INT