This is the 5793rd most frequent Portuguese word.
assista
"Assista" means "watch" or "attend" (command form).
Here, 'assista' is a verb in the present subjunctive mood used in a command or suggestion to watch a movie.
Assista ao filme que recomendei ontem.
Watch the movie I recommended yesterday.
'Assista' is used in the present subjunctive mood to express hope or uncertainty about him attending the lecture.
Espero que ele assista à palestra amanhã.
I hope he attends the lecture tomorrow.
Here, 'assista' is in the subjunctive mood and indicates a conditional situation where watching the program leads to informing.