يبدو هذا البرنامج سهلا.

يبدو means seems or appears.

It is the present-tense form of بدا. In this sentence it is 3rd person masculine singular, because البرنامج is a masculine singular noun.

So the basic idea is:

• يبدو = it seems / it appears
• هذا البرنامج = this program
• سهلًا = easy

Yes, you could also say هذا البرنامج يبدو سهلًا.

Both orders are possible in Modern Standard Arabic:

• يبدو هذا البرنامج سهلًا
• هذا البرنامج يبدو سهلًا

The first one is verb-first, which is very common in Arabic and often sounds neutral and natural in formal style.
The second one is subject/topic-first, which can make this program feel a bit more prominent.

So this is mostly a word-order question, not a meaning change.

Arabic usually does not use a present-tense word for is in simple sentences.

For example:

• هذا البرنامج سهلٌ = This program is easy

There is no separate present-tense is there.

In your sentence, there is already a real verb: يبدو = seems. So Arabic does not need anything like is or is being.

In standard Arabic, after a demonstrative like هذا or هذه, the noun is usually definite, so it normally takes ال.

So:

• هذا البرنامج = this program
• هذه السيارة = this car

This is different from English. English says this program, but Arabic usually says the equivalent of this the-program.

Because برنامج is a masculine singular noun.

The demonstrative has to match the noun:

• هذا = this for masculine singular
• هذه = this for feminine singular

So:

• هذا البرنامج = this program
• هذه الفكرة = this idea

The fully vocalized form is سهلًا.

In normal Arabic writing, short vowels are usually not written, so you often see:

• سهلا

But the careful grammatical form is:

• سهلًا

The ending ًا shows tanwīn fatḥ. That is the usual written shape for many indefinite accusative nouns and adjectives.

Because after بدا / يبدو in this kind of sentence, the following description is treated as the predicate/complement, and in careful MSA it is accusative.

So the expected form is:

• يبدو هذا البرنامج سهلًا

not:

• يبدو هذا البرنامج سهلٌ

If you see Arabic without vowel marks, this difference is often invisible in writing. But grammatically, سهلًا is the expected form here.

It is still an adjective meaning easy, but here it is not directly modifying البرنامج inside one noun phrase. It is the description that comes after يبدو.

Compare:

• البرنامج السهل = the easy program
  Here السهل directly describes البرنامج, so it matches it in definiteness.

• يبدو البرنامج سهلًا = the program seems easy
  Here سهلًا is a separate complement after يبدو, so it does not take ال.

So the difference is:

• adjective inside the noun phrase: البرنامج السهل
• predicate/complement after يبدو: البرنامج سهلًا

In a fully marked sentence, it would be nominative:

• يبدو هذا البرنامجُ سهلًا

In ordinary writing, the short ending -u is usually not written, so you just see البرنامج.

The whole phrase هذا البرنامج is the thing that seems easy.

Yes. A very common alternative is:

• يبدو أن هذا البرنامج سهلٌ

This means It seems that this program is easy.

So Arabic has two common patterns:

• يبدو هذا البرنامج سهلًا
• يبدو أن هذا البرنامج سهلٌ

Both are natural. The version without أن is a bit shorter and more direct.