No plugins required with Shotcut.
This is all done with Keyframes : https://youtu.be/j9xb1Rzn2Sg
Many filters have this, and for text and images to duplicate the above video, you would be utilizing either Size & Position, or Scale & Rotate filters, or both. There is no one way of doing this and it comes down the person’s style of editing.
You can use one of the shake presets in the size & position filter, or just create your own. All you have to do is place your text or png on screen and apply advanced keyframes. The “float” is created by moving the text 20 or 30 pixels in one direction and returning it to where it started over about 6-8 frames. Using smooth keyframe types should give you the gentle effect you want.
Just change the values in the position section. X moves it left if you reduce it, right if you increase, and Y moves it up and down. just type in a new value, 30 or so different and the text will move in that direction by the number of pixels you input
Exactly right. Set a keyframe in one position - advance say 3 frames, alter those digits by about 30 pixels, advance 3 more frames and set those figures back to what they were before. If you want you can do it again with smaller movements over maybe 2 frames to give the impression it is settling into place.