Learn Italian: Comunichiamo spesso con messaggi e video. - We often communicate with messages and videos.

The base verb is comunicare. When adding the -iamo ending for 'we', Italian adds an h to keep the hard 'c' sound (like a 'k'). Without the h, it would be pronounced with a soft 'ch' sound.

Why does spesso come after the verb here?

In Italian, adverbs of frequency like spesso (often), sempre (always), and mai (never) typically go right after the conjugated verb. This is different from English, where we usually put 'often' before the verb.

Why doesn't the word video change its ending for the plural?

Video is treated as a modern foreign loanword in Italian. Most loanwords are invariable, meaning they don't change in the plural. You would just say un video for singular and due video for plural.

Why does messaggi only have one i at the end instead of two?

The singular is messaggio. For nouns ending in -io, you usually just drop the -o to make it plural, leaving a single -i. You only use a double -ii if the stress of the word falls on that letter, which isn't the case here.