Learn Italian: Registravi anche i programmi in televisione? - Did you also record the programs on television?

Registravi is the imperfetto (imperfect) tense. It is used here because it asks about a repeated, habitual action in the past, meaning "Did you used to record...?". If you were asking about a single, specific time someone recorded a show, you would use the passato prossimo (hai registrato).

How is the imperfetto form registravi created?

For regular -are verbs like registrare (to record), you drop the -re from the infinitive to get the stem (registra-), and then add the imperfetto endings. For the tu (you) form, the ending is -vi, giving us registravi.

Why is it i programmi if the singular ends in -a?

The singular word is il programma. Even though it ends in -a, it is actually a masculine noun. This is a common exception for Italian words of Greek origin ending in -ma (like il problema). Because it is masculine, its plural changes the -a to -i, making it i programmi.

Why do we use the preposition in for "on television"?