TV-viewer
absolute
adducible
admissible
attestant
attestative
attestator
attester
attestive
authentic
based on
beholder
bird-watcher
bystander
certain
circumstantial
cojuror
compurgator
conclusive
convincing
cumulative
damning
decisive
deponent
determinative
documentary
documented
drugstore cowboy
earwitness
evidential
evidentiary
ex parte
eye-witness
factual
final
firsthand
founded on
gaper
gazer
gazer-on
girl-watcher
goggler
grounded on
hearsay
implicit
incontrovertible
indicative
indisputable
informant
informer
looker
spectator
viewer
watcher
witness
anecdotal
blow-by-blow
checkpoint
confirmatory
contemporaneous
corroborative
countervailing
first-hand
unsubstantiated
voiceprint
fitness