There's no mention of software in your post, have you installed Apple Video Player? :?:
VCRs are VERY inexpensive at Goodwill, the movies cost considerably LESS than even a NetFlix rental . . .
. . . and after spending $1.00 on each of these obsolescent (think 8-Track and its restored cool factor, BTW) "bits" of Analog Media Storage, you can watch them again and again or recycle them at GoodWill for the use of others sticking to the information cowpath. And the "640x480p" digitized analog content (actually its pixel-doubled 320x240p, but lets not get too testical about it!) looks MUCH better/sharper displayed on a computer monitor than a TV, especially when you can utilize the S-Video input.
jt :b&w:
p.s. the tuner card runs swimmingly in my 6360 w/Sonnet Crescendo G3 466 & OS 9.something-or-other.