Please post the name of the program you use so a Moderator may move this message to the correct program forum
This forum is not about help with programs... a program would be Photoshop or Dreamweaver or Muse or ???
Look like CC Animate. I think the file your trying to embed is simply too large.
The little 'An' icon shows that it's Adobe Animate.
I think Nancy is right. When you embed FLV into the timeline it effectively ends up being entirely in memory, and there's probably an upper limit for how much that can be. If you want to play a large FLV file, use the FLVPlayback component, and keep the FLV as an external file.
Looked at it and tried everything to downsize it... make a new one... and
even tried a random that was 1 second long and i still have the same error
On Saturday, October 29, 2016, Colin Holgate <email@example.com>
Are you able to upload your small test FLV? There may be something wrong with it, I can try doing the same import.