Mun kalli bidiyo.

Mun is the subject marker for we in the completive/perfective aspect. In this sentence, it gives the idea of we watched or we have watched.

So:

• mun = we
  • completed action

It is not just a plain standalone pronoun like English we; it already carries aspect information too.

Usually, yes, this will be translated as a past action: we watched a video.

But more exactly, mun shows that the action is completed, not simply that it is in the past. Depending on context, English might translate it as:

• we watched a video
• we have watched a video

So Hausa is working with aspect here more than English-style tense.

Kalli means watched, looked at, or viewed, depending on context.

With bidiyo (video), the most natural English translation is watched:

• Mun kalli bidiyo. = We watched a video.

If the object were something else, kalli could also be understood as looked at.

Because Hausa kalli can take its object directly.

In English, we often say:

• look at a video

But in Hausa, you can simply say:

• kalli bidiyo

So there is no extra word here for at.

That is because kalli and kallo are different forms.

• kalli is the verb form used here in the sentence
• kallo is commonly the verbal noun, meaning something like watching or a look

For example, a progressive sentence often uses the verbal noun:

• Muna kallon bidiyo. = We are watching a video.

So kalli in Mun kalli bidiyo is the correct form for this completed action sentence.

Yes. Bidiyo means video, and it is a borrowing from English.

It is very common in Hausa to use borrowed words, especially for modern items and technology. Here it is singular:

• bidiyo = video

Hausa does not use separate articles in the same way English does.

So a bare noun like bidiyo can often be understood from context as:

• a video
• video

If you need to make it more clearly definite, Hausa often does that in other ways, not by putting a separate word before the noun like English the.

So in this sentence, bidiyo naturally works as a video.

The order here is:

• mun = subject marker
• kalli = verb
• bidiyo = object

So the pattern is basically:

• Subject + Verb + Object

That is similar to English word order:

• We watched a video.

A rough pronunciation guide is:

• mun KAL-li bi-DI-yo

A few helpful points:

• mun has a short u sound, not exactly like English, but close to a short oo
• kalli has a doubled l, so the l is held a little longer
• bidiyo has clear vowels: bi-di-yo

As always with Hausa, the written form usually does not show tone in normal everyday spelling.

No. For an ongoing action, you would normally use a different structure.

For example:

• Muna kallon bidiyo. = We are watching a video.

So:

• Mun kalli bidiyo. = completed action, we watched / we have watched
• Muna kallon bidiyo. = ongoing action, we are watching

This is a very common contrast in Hausa.