These transitions were originally created in Hitfilm, was created with fractal noise and it was made by me. The (Which is the second and last transition) was created in Hitfilm by another YouTuber known as
motionepicFX, but it was only available as a project file for hitfilm, So, I just export it and made a video on how to use the in shotcut.
Transitions.zip (2.5 MB)
There was also the , but it seems to be not working with shotcut. But you can check that if it works for you:-
And if you do not know how to use the and , then someone has made a very good tutorial on it.