Agradezco haber arreglado el enchufe antes de la videollamada.

Agradezco is a verb: I appreciate / I am grateful for / I thank.

So this sentence is built as a full clause with a conjugated verb:

• Agradezco... = I appreciate...

By contrast, gracias is just a fixed expression:

• Gracias por arreglar el enchufe. = Thanks for fixing the plug/socket.

Both are natural, but agradezco sounds a bit more formal, deliberate, or complete than just gracias.

Haber arreglado is the perfect infinitive. It means to have fixed.

It is used because the fixing happened before the moment of appreciation:

• Agradezco haber arreglado... = I appreciate having fixed... / I appreciate that it was fixed...
• Agradezco arreglar... would sound wrong here, because it suggests the action in a more general or simultaneous way.

So the structure highlights that the action was already completed.

A useful pattern:

• agradecer + haber + past participle

Examples:

• Agradezco haber venido. = I appreciate your having come.
• Lamento haber llegado tarde. = I regret having arrived late.

Grammatically, haber arreglado does not explicitly say who did it.

That person is usually understood from context.

Depending on the situation, it could mean:

• I appreciate having fixed the socket myself
• I appreciate your having fixed the socket
• sometimes even a more general I’m grateful that the socket got fixed

If Spanish wants to make it clearer, it often adds context:

• Te agradezco haber arreglado el enchufe... = I thank you for having fixed the socket...
• Agradezco que hayas arreglado el enchufe... = I appreciate that you fixed the socket...

As written, the sentence is slightly open, so context matters.

Because Spanish normally omits subject pronouns when the verb already makes the subject clear.

• Agradezco clearly means I appreciate / I thank
• so yo is unnecessary

You could say:

• Yo agradezco haber arreglado el enchufe...

But adding yo usually gives extra emphasis, contrast, or clarification:

• Yo agradezco haberlo arreglado; otros no.
  = I appreciate having fixed it; others don’t.

In neutral Spanish, leaving out yo is more natural.

In Spain, enchufe commonly refers to an electrical plug or a power socket/outlet, depending on context.

So arreglar el enchufe could mean:

• fixing the plug
• fixing the wall socket / outlet

In this sentence, many learners would understand it as the socket/outlet because that is something you might need working before a video call.

In Spain, related words include:

• enchufe = plug / socket
• toma de corriente = power outlet/socket, more technical or explicit
• clavija = plug (the part on the cable), more specific

So enchufe is common, everyday Spanish.

Because antes de is used before a noun or an infinitive, while antes de que is used before a conjugated verb.

Here we have a noun phrase:

• la videollamada = the video call

So:

• antes de la videollamada = correct

Compare:

• antes de la videollamada = before the video call
• antes de empezar la videollamada = before starting the video call
• antes de que empezara la videollamada = before the video call started

So the choice depends on what comes next:

• noun → antes de
• infinitive → antes de
• conjugated verb → antes de que

Because it refers to a specific video call:

• la videollamada = the video call

Spanish often uses articles where English sometimes does and sometimes does not. Here, the article is natural because the speaker has a particular call in mind.

Without the article:

• antes de videollamada sounds incomplete or unnatural in normal Spanish

You would normally say:

• antes de la videollamada
• antes de una videollamada if it were non-specific

Yes. Videollamada is normally written as one word.

This is standard and very common in modern Spanish, especially in Spain.

You may also hear other expressions such as:

• llamada de vídeo
• llamada por vídeo

But videollamada is very common and perfectly natural.

No, that would change the meaning or sound wrong.

Here, antes de la videollamada tells us when the fixing happened:

• before the video call

If you used por, it could suggest because of the video call:

• arreglé el enchufe por la videollamada = I fixed the socket because of / for the sake of the video call

So:

• antes de = time relationship
• por = reason, cause, or purpose in some contexts

In the original sentence, the important idea is that the fixing happened earlier than the call.

Yes, and in many situations that would actually be clearer.

• Te agradezco haber arreglado el enchufe...
  = I thank you / I appreciate your having fixed the socket...

This version clearly says that you are the person being thanked.

Without te, the original sentence is more detached and can sound a little less explicit about who is being thanked or who did the action.

Other common alternatives:

• Gracias por haber arreglado el enchufe...
• Te agradezco que hayas arreglado el enchufe...

All are possible, but they are slightly different in tone and structure.

Both can be correct, but they are structured differently.

1. Agradezco haber arreglado el enchufe...

   • uses the perfect infinitive
   • is more compact
   • can be a little less explicit about the subject

2. Agradezco que hayas arreglado el enchufe...

   • uses que + subjunctive
   • clearly presents the fixing as a completed action by someone else
   • often sounds more natural if you are explicitly thanking another person

So if you want to say I appreciate that you fixed the socket, many speakers would prefer:

• Te agradezco que hayas arreglado el enchufe... or
• Agradezco que hayas arreglado el enchufe...

The infinitive version is grammatical, but the que + subjunctive version often feels clearer when another person is involved.

Arreglado is the past participle of arreglar.

In haber arreglado, it combines with haber to form the perfect infinitive:

• haber + past participle

So:

• haber arreglado = to have fixed

This is the same participle you see in other perfect forms:

• he arreglado = I have fixed
• había arreglado = I had fixed
• después de haber arreglado = after having fixed

So arreglado is there because the structure requires the past participle.

Yes. The tense depends on when the appreciation happens.

• Agradezco haber arreglado el enchufe...
  = I appreciate / I am grateful now...
• Agradecí haber arreglado el enchufe...
  = I appreciated / was grateful then...

So if you are talking about a past moment, the preterite may fit:

• Agradecí haber arreglado el enchufe antes de la videollamada.

The original uses the present because the speaker is expressing that feeling now.

It is grammatical and understandable, but in everyday conversation many speakers might choose a slightly more direct version, especially if they are thanking someone else.

Very natural alternatives include:

• Gracias por arreglar el enchufe antes de la videollamada.
• Te agradezco haber arreglado el enchufe antes de la videollamada.
• Te agradezco que hayas arreglado el enchufe antes de la videollamada.

The original sentence sounds a bit more neutral or formal, and without extra context it leaves the subject of haber arreglado less explicit.