When guy texts you while watching movie what does that mean?

Answer 1

It could mean a wide number of things. Everybody is different and everyone behaves differently, so there is no way to accurately answer this question, because we do not know this individual personally. The only way you can get your answer is by asking him.

The movie could be boring. Or he may have texted you during commercial breaks.
Either way, the fact that he texts you implies he sees you at least as a friend. It doesn't imply anything else.

Answer 2

When a guy texts you while watching a movie, it probably means that he likes you. Even though he's engrossed in something else he is still giving you his time. Not always though.