Scrolling text on video
I hope after 3 years you managed to solve it. But here is an option anyway.
Use any decent video editor.
Some editors have &quot;text&quot; effects, like an &quot;end credits scene&quot;. On Davinci Resolve (which is free) you simply add this effect and control the speed, font, color.
Some other programs simply allow you to import an image file with a transparent background and move it around the frame.
You can prepare this PNG file in Gimp, add the text there and import and move it on the editing program.
Some programs that allow you to move elements (Keyframing) are Hit film express and OpenShot, besides Davinci Resolve.