noun
through a screen; via screen
Describes interaction or viewing that happens through a computer, smartphone, or similar display, rather than in person.
画面越しの会話は、やっぱり直接会うのとは違う。
Conversations through a screen are, after all, different from meeting in person.
画面越しに相手の表情を読み取るのは難しい。
It's hard to read the other person's expression through a screen.
オンライン is a broader term for online activity; 画面越し specifically emphasizes the mediation of a screen.
Compound of 画面 (screen) and 越し (across, through). The suffix 越し indicates doing something through or across a medium.