Inserting an MP4

Hi,
This is the first time I have used Fusion. I have used Premier Pro briefly.
I'm looking forward to using it, but I can't even get the basics of inserting a file correct.
I have tried drag and drop and right-click> Add Tool > I/O > Loader, but the best I have come up with is a yellow bar with Loader written in it.
Would appreciate a bit of help.
Thanks.
This is the first time I have used Fusion. I have used Premier Pro briefly.
I'm looking forward to using it, but I can't even get the basics of inserting a file correct.
I have tried drag and drop and right-click> Add Tool > I/O > Loader, but the best I have come up with is a yellow bar with Loader written in it.
Would appreciate a bit of help.
Thanks.