What is your filename for the json.
After much messing about through the ACF forums I found out that my blocks.json file was failing to load because the block json requires them to end in block singular ( i.e. block.json or file-block.json etc )
I resolved this by adding mp4 as a allowed filetype.
You can then filter to show just MP4 as ACF allows you to search by MIME type in the open library windows
The only code amend is to tweak the backend CSS so the box does not collapse to 30px-vs-30px
add_action(‘admin_head’, ‘tweak_acf_custom_field_dimensions’);
function tweak_acf_custom_field_dimensions() {
echo ‘<style>
[data-layout=”FIELDNAME”]
.acf-image-uploader .image-wrap img {
min-width: 150px;
min-height: 150px;
}
</style>’;
}
Yeah – this seems to be happening again for me as well.
Quick (and fairly lazy) fix is to just style them out of the UI box for iThemes
Just insert the following into the WP Admin Dashboard header by amending your functions.php file and it should remove them without having to worry about plugin updates “breaking” the fix.
https://gist.github.com/tjhole/8aa39c9062746fcbb862 into your functions.php file