كتبت تعليق تاني عالفيديو وشرحت فيه ليش تاخرت عالاجتماع.

Because they are all past-tense verbs.

In this kind of spelling, the ending -ت can represent:

• I did something
• or she did something

So:

• كتبت = I wrote or she wrote
• شرحت = I explained or she explained
• تاخرت = I was late or she was late

Usually context tells you which one is meant. Since the meaning has already been given to you, here it is understood as I wrote / I explained / I was late.

This is very common in Arabic: the written form can be ambiguous until the context makes it clear.

You know from context, not from the spelling alone.

In normal unvoweled writing, كتبت could mean either:

• I wrote
• she wrote

The same is true for the other verbs in the sentence. If this sentence appeared by itself with no context, a reader might briefly consider both possibilities. But in real conversation or text, the surrounding context usually makes it obvious.

So the grammar allows both, but the intended meaning here is I wrote.

Here تعليق تاني most naturally means another comment or one more comment.

In Levantine, تاني often means:

• another
• again
• second, depending on context

So كتبت تعليق تاني is usually understood as:

• I wrote another comment

If you wanted to make the second comment more explicit, you would usually need clearer context or a different phrasing.

تاني is the common colloquial Levantine form.

Compare:

• تاني = everyday spoken Levantine
• ثاني = more formal / closer to Standard Arabic

A learner will hear تاني all the time in speech. It is very natural here.

عالفيديو is a contraction of:

• على الفيديو = on the video

In Levantine, على الـ often becomes عالـ in writing and speech.

So:

• عالفيديو = على الفيديو
• pronounced roughly ʿal-video

This kind of contraction is extremely common in informal writing.

Because تعليق على الفيديو literally means a comment on the video.

That matches English pretty closely:

• comment on the video
• تعليق عالفيديو

So this part is actually quite straightforward: على here means on.

فيه means in it or in that.

In this sentence, فيه refers to the comment (تعليق), not the video.

So:

• وشرحت فيه = and I explained in it
• more natural English: and I explained there / in that comment

Arabic often keeps this kind of reference explicit, even when English might leave it out.

Because تعليق is a masculine noun.

So when فيه refers back to تعليق, it uses the masculine form:

• فيه = in it for a masculine noun
• فيها = in it for a feminine noun

Since تعليق is masculine, فيه is the correct choice.

Because Arabic often likes to make the connection more explicit.

The sentence is basically:

• I wrote another comment on the video
• and I explained in it why I was late to the meeting

That فيه tells you where the explanation was given: in the comment.

In English, we often drop that and just say:

• I wrote another comment on the video and explained why I was late

But in Arabic, keeping فيه sounds natural and clear.

ليش means why.

It is one of the most common Levantine question words.

So:

• ليش تاخرت = why I was late

Compared with more formal Arabic:

• ليش = colloquial Levantine
• لماذا = formal / Standard Arabic

If you are learning spoken Levantine, ليش is the one you will hear constantly.

This is a very common feature of informal colloquial spelling.

The more formal spelling would be:

• تأخرت

But in everyday texting or casual writing, people often write:

• تاخرت

So the hamza is often omitted in colloquial writing, even though the word is understood perfectly.

This does not mean it is a different verb. It is the same idea:

• تأخر / تاخر = to be late

In Levantine, تأخر على is a common way to say be late for / to something.

So:

• تاخرت عالاجتماع = I was late to the meeting

This is one of those cases where the preposition used in Arabic does not map perfectly onto the one used in English. English says late to or late for, while Levantine very naturally uses على here.

So even if it feels unusual at first, it is idiomatic.

Yes, it is very natural.

The order is:

• وشرحت = and I explained
• فيه = in it
• ليش تاخرت عالاجتماع = why I was late to the meeting

Arabic often places that little reference word early:

• I explained in it why...

That sounds normal in Levantine. English might prefer:

• I explained in it why... or more naturally:
• I explained there why...
• I explained why...

So the Arabic structure is natural even if the English translation ends up sounding a bit different.

Several things make it sound clearly spoken Levantine rather than formal Standard Arabic:

• تاني instead of ثاني
• ليش instead of لماذا
• عالفيديو / عالاجتماع instead of fully separated على الفيديو / على الاجتماع
• تاخرت instead of the more formal spelling تأخرت
• no case endings or other formal written features

So this sentence is a very good example of natural everyday Levantine writing.

A rough pronunciation would be:

katabet taʿlīʾ tāni ʿal-vīdyo w sharaḥet fīh lēsh taʾakhkharit ʿal-ijtimāʿ

A few notes:

• كتبت is often pronounced something like katabet
• تعليق is taʿlīʾ
• عال is ʿal
• ليش is lēsh
• تاخرت is often pronounced close to taʾakhkharit in speech, even if casually spelled without the hamza

Pronunciation varies somewhat by region, but this is a useful general guide.