Do you expect CNN or FOX News to show up with video cameras?
The whole entire point of the Gospel is Jesus began as a poor peasant worker "mustard seed" whose movement germinated & grew until it "moved the mountain" of the pagan empire
It started small, the only people who had "eyes on" were:
- Jews who became Christians
- Jews who rejected the Christians & whose survivors became modern Rabbinical Judaism
- Romans
All three groups make more mention of Jesus Christ in the paltry meager amount of writings to have survived until today, than anyone has a right to expect or demand.
Roman writers knew of conflicts regarding "Chrestus" causing quite a commotion in Rome, Josephus mentions him specifically. (Pilate's own wife allegedly viewed Jesus as a magical holy man.)