انا بتفرج على فيلم لو عندي وقت اكتر بعد الشغل.

Yes, you can usually drop it.

In Egyptian Arabic, the verb already tells you the subject, so بتفرج already means I watch / I’m watching in context.
أنا is often added for:

• emphasis
• contrast
• extra clarity

So both of these are possible:

• أنا بتفرج على فيلم...
• بتفرج على فيلم...

The first sounds a little more explicit; the second is often more natural in everyday speech.

بتفرج على means I watch or I’m watching.

The basic Egyptian verb is اتفرج على = to watch / look at.
So:

• بتفرج على فيلم = I watch a movie / I’m watching a movie

This is a very common Egyptian way to talk about watching TV, movies, videos, etc.

Because the verb اتفرج normally goes with على in Egyptian Arabic.

So you learn it as a unit:

• اتفرج على = watch / look at

This is similar to how English has verbs that naturally go with certain prepositions, even if they do not translate word-for-word.

Examples:

• بتفرج على فيلم = I watch a movie
• بتفرج على التلفزيون = I watch TV
• اتفرج على الصورة = Look at the picture

So على is not optional here in normal usage.

The بـ marks the normal present tense in Egyptian Arabic.

It is commonly used for:

• habitual actions: I watch
• ongoing present actions: I’m watching
• general present statements

So:

• بتفرج = I watch / I’m watching

Without بـ, the verb form can appear in other structures, such as after certain particles or in different grammatical environments, but the everyday present form here is بتفرج.

It can mean either one. Context decides.

In Egyptian Arabic, the same present form often covers both:

• I watch
• I am watching

In this sentence, because of لو (if), it most naturally sounds like a general or repeated idea:

• I watch a movie if I have more time after work

If you wanted a very specific future meaning, Egyptian often uses the future marker:

• هتفرج على فيلم لو عندي وقت أكتر بعد الشغل
  = I’ll watch a movie if I have more time after work

Because فيلم here is indefinite, meaning a movie.

In Arabic:

• فيلم = a movie
• الفيلم = the movie

So بتفرج على فيلم means I watch a movie, not the movie.

Arabic does not use a separate word for a/an, so the lack of الـ often gives that indefinite meaning.

This is a very common Arabic possession structure.

Literally, عندي is something like at me or with me:

• عند = at / with
• -ي = my / me

So:

• عندي وقت = I have time
• literally: there is time with me / at my disposal

Arabic often expresses possession this way instead of using a verb exactly like English to have.

More examples:

• عندي عربية = I have a car
• عندك سؤال؟ = Do you have a question?
• عندهم شغل = They have work

Because in Arabic, descriptive words usually come after the noun.

So:

• وقت أكتر = more time
• literally: time more

This word order is normal in Arabic.

You will see the same pattern in many expressions:

• فلوس أكتر = more money
• ناس كتير = many people
• حاجة كبيرة = a big thing

So even though English says more time, Egyptian Arabic naturally says time more.

لو means if.

In this sentence, it introduces a condition:

• لو عندي وقت أكتر بعد الشغل = if I have more time after work

Then the other part gives the result:

• أنا بتفرج على فيلم = I watch a movie

So the whole idea is:

• I watch a movie if I have more time after work

In Egyptian Arabic, present-tense forms are often used in this kind of general conditional sentence.

If the speaker means a more specific future situation, you will often hear the future in the result clause:

• لو عندي وقت أكتر بعد الشغل، هتفرج على فيلم
  = If I have more time after work, I’ll watch a movie

بعد means after, so no extra preposition is needed.

• بعد الشغل = after work

And الشغل means work or the work/job.

In everyday Arabic, using the definite article in expressions like this is very common, so الشغل can simply mean work in the general sense.

So:

• بعد الشغل = after work
• قبل الشغل = before work
• في الشغل = at work

It is understandable, and it works well if you mean a general habit or repeated situation.

A very natural version is:

• لو عندي وقت أكتر بعد الشغل، بتفرج على فيلم.

Putting the if clause first often sounds smoother, though both orders are possible.

If you mean a specific future plan, a more natural version would be:

• لو عندي وقت أكتر بعد الشغل، هتفرج على فيلم.

So the best choice depends on meaning:

• بتفرج = general/habitual or present-style statement
• هتفرج = future, I’ll watch