How to export video in Hitfilm?

Select the text and go to the Text Panel to customize text, like font, color, size, and spacing

to animate text in hitfilm:

Select the text layer and choose the property you want to animate

Click the stopwatch icon next to the property to set a keyframe at the current point.

Move the timeline cursor and adjust the property value.

Click the stopwatch again to set another keyframe.

Hit the play button to see your animated text!

You can use Ctrl+Z command to undo in Hitfilm express.

Visit Transitions, go to the Audio folder and drag the Fade effects onto your clip to add audio fade.

To add green screen in hitfilm, follow the following steps;

Select the video and the background you want to add.
Place these videos on two separate tracks and go to the Effects panel to find Green screen Key
Drag the Green screen Key onto the video and control the green screen settings on Controls panel