見てたら

while watching, when watching

→ 見る

見 see, watch, look at + て Te-form (conjunctive) + た Past tense + ら conditional

verb · conditional Rare #38,327

while watching, when watching Colloquial contraction of 見ていたら.

JA: テレビを見てたら、友達から電話がかかってきた。

EN: While I was watching TV, a friend called me.

Conjugation of 見る

Conditional

I'm here about Katie. Why don't you watch some TV or something?

— ミスティック・リバー (2003)

If anyone watches for a little too long, honk the horn, okay?

— 罪人たち (2025)

If someone has been watching for a long time

— 罪人たち (2025)

What would you do if someone were watching us?