That piano part which starts at 1:40+ is simply epic. Overall the song was good
The song could had more musical phrases for example listen to "requiem for a dream" -> I consider this as an epic orchestral song.
I think you can now start incorporating the vocals in your songs. By vocals I mean orchestral awww's wahhhh's lol
Also use voice strings. These strings make a whistling sound and also give out some
a-e-o(one of them) sounds. Try to add more darkness into the song by introducing more drums playing in background softly with lots of reverbs and delay
In the description of the video add "How to contact me" cause you have just written
that to use the song the person needs to contact you but in case he is new to all the youtube stuff then he won't be able to figure out quickly how to contact you
Also add more orchestral pieces. There are so many that you can use
And the biggest advice: If you are still using soundfonts then stop using them and instead find vst's which you can use to play orchestral sounds cause they can provide more rich sounds. FL Studio comes with Ogun. It produces very very very rich sounds which are so full of textures. Learn how to make your own presets and start using it. It might take a lot of time to learn so instead you can just go with the presets and other vst's
best of luck for track 3