Since Blocs is Mac platform based I thought that a slideshow made in photo could be imported (movie?) into blocs. I tried everything but can’t get the .m4v imported. Apple’s photo has far more effects than Blocs and is less tedious when you need to make large slideshows.
Try converting it into a MP4. I think thats what BLOCS uses but not 100% sure. Also file size could be a limiting factor?