YOU SAID:

I sat on the couch while Nathan watched videos.

INTO JAPANESE

ネイサンがビデオを見ている間、私はソファに座っていました。

BACK INTO ENGLISH

I was sitting on the couch while Nathan was watching the video.

INTO JAPANESE

ネイサンがビデオを見ている間、私はソファに座っていました。

BACK INTO ENGLISH

I was sitting on the couch while Nathan was watching the video.