Films were produced by big companies in the past, but today people areanybody is able to make a film.

Or "average people are / everyday people are"

These days, filmmaking has no longer been restricted to large corporations, as individuals can easily make videos.

Filmmaking has become within the reach of the general populace, unlike in the past when it was monopolized by large, resource-rich firms.

fFilmmaking has become democratic, unlike in the past when it was monopolized by large, resource-rich firms.

Would you mind suggesting some other ways to write the introduction ¶
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In my opinion, this is totally a conclusive trend as they can create remarkable improvements for both the citizensaverage person and the companies.

I might be misunderstanding, but I'm not sure what a conclusive trend would mean. I know "conclusive case"?

Also, citizen is more for countries. Try average person instead.

dDoes conclusive sound natural in that context?

wWould you mind giving me some synonyms of positive?

Firstly, bywith the ability tof makinge a film or a movie, individuals can satisfy their passions of for becoming a well-known person.

Or better "becoming famous"

(Passions or passion, after their are plural or singular nouns?)

The correct English is passion, but you will hear passions in speech. I don't quite know what you mean by this sentence though.

As a result, they can be a brilliant director or a splendid movie star just by using their smartphones, filming whatever they like, and uploading it to the internet, i. In addition, with the widespread use of social networking sites like yYoutTube or tTiktTok, their videos will be popularize as long as their contents are is interesting.

For social media, content is always singular.

Secondly, teenagers can use their home-made videos as trials to see if they want to be involved in the movie industry in the future, t. They can learn how to set up a movie scene, how to record, and even how to edit videos to create a masterpiece.

Does home-made videos sound natural?

Yes, it does! You can also use "amature videos / movies" to sound more academic. But I honestly like homemade best.

This indeed provides them with experiences before entering the enormous movie industry.

Enormous sounds strange here for me. Maybe "the (daunting / established / cutthroat)" might work better? It will depend on the meaning you want to convey.

Additionally.,

For instance, some recent blockbusters recently titles contained scenes recorded from people’s smartphones.

And they affect positively on viewers as the movies get more realisticThe more realistic a scene gets, the more a viewer is (immersed in the scene / able to relate to the movie).

This sentence doesn't work well. I recommend rewriting it. The suggestion above is one way, but there are many ways you can try.

Furthermore, those big companies can find out talents, that they can recruit and train them into a real movie starts that can make every ticket be sold out right on hissell out tickets as soon as they debut.

Consequently, the fame and profit of the companies will, therefore, rapidly raise.

You only need one (consequently/therefore)

To conclude, the fact that people are able to make films in the modern age is an absolutely productive trend, since they can bring back merits for individuals and big movie companies.

Bring back implies they used to do this, but don't now.

iIn conclusion, the ability to create films independently allows individuals to gain recognition and familiarize themselves with the filmmaking process before (even) entering the industry.

Therefore, it iscan generally be regarded as a positive trend.

You are talking about your opinion, so this way. If you are saying other sources think it is positive, use the original.