Hi,
Strangely after a few reinstalls Shotcut didn’t crash but didn’t do what I wanted either. Here is a video showing what I did and what happens. Note that I turned Composite off in the Track 2 when the letters in the black background are shown:
Now another video this time with the Text filter. We can see that the letters are shown with Composite on in Track 2 and with a transparent background. This is what I wanted to do but with the Overlay HTML:
Regards,
Luis Sismeiro