Opening study

Find openings that get you to a playable middlegame that you want to play. 

Learn and understand the "why" behind the moves:

Why do the pieces go where to go?

Why do the pawns go where they go?

Just memorizing openings is a recipe for failure.

I wanna study queen's gambit for white and French for black. All I can find are YouTube videos with tricks which I'm not interested.

https://www.youtube.com/watch?v=CMy65JeSShw&list=PLssNbVBYrGcBfDsANalbRg2L7tL5L93Gk

This is a playlist from Hanging Pawns for QGD. He has playlists on most openings (bear in mind that he is 1 900 FIDE and his opening videos are fine for up to his level maximum). You can use those playlists to gain some basic knowledge of certain variations. 

Now, another thing to bear in mind. You are 1 200 rated. Try not to overdo opening study. I mean you can try to memorize something, but it will not be really effective on that level (people will deviate early and it will be harder to memorize because you will not understand some moves).

Getting to know some variations on a basic level is fine of course. 

Saint Louis club chanel have some variations explained in more detail, but not on all openings. You can check those out as well, but as I've said, unless you really want to do this, you can spend time more productively most likely (by learning tactics or some basic endgames etc.).

Apart from videos, what you should do after playing games is reviewing the opening you've just played. Look at the database and see with engine as well if you've made some major error in the opening. Those clear mistakes in the opening you will like to avoid.

In any case, good luck.

browse...

Chess Openings Resources for Beginners and Beyond...

https://www.chess.com/blog/RussBell/openings-resources-for-beginners-and-beyond

You are 400 rated, the best thing you can do is to avoid memorizing anything but first 3 moves or so, AKA decide what you will play as white and decide responses against e4 and d4 as black.

Apart from that, learn what are opening principles, follow them, play longer games and try to decrease number of blunders. Learning specific openings should be low on your list of priorities.

As a reference, I am around 1 600. I did just a small bit of memorization. Most of what I memorize is because of the games I've played , only a little is by actively memorizing moves. And generally on this level, it is not really needed to memorize too much. 

Honestly many games you play won't be decided in the opening but the endgame, so I would recommend you study that heavily for a while.

I saw some of OP's matches and he's not the kind of player who blunders every move so it makes sense for him to study openings! I saw you played 3... c5 against Gilberto which is a blunder as White wins a pawn with exd5 followed by dxc5 and Qxd5! I know that c5 is a typical French move but this is the proof why just knowing the typical ideas of your opening is a Recipe for blunders if you are unaware of the theory. I also saw you won a Queen vs Bishop pawn endgame when your King was near the pawn, your endgames are fine you just need to improve your openings more

Instead of that, it's better to learn how to play chess first!