file upload – Securly uploading videos in PHP

This question is about letting a potentially malicious user upload videos to your site – specifically, handling the file itself.

With images, one one simple thing you do (after every other thing is validated) is

    if( $uploaded_type == 'image/jpeg' ) {
        $img = imagecreatefromjpeg( $uploaded_tmp );
        imagejpeg( $img, $temp_file, $imageQualityPercentage);
    elseif( $uploaded_type == 'image/png') {
        $img = imagecreatefrompng( $uploaded_tmp );
        imagesavealpha($img, TRUE);
        imagepng( $img, $temp_file, 9*(1-$imageQualityPercentage/100));

Which basically re-creates the image from user input.

Is there an equivalent in PHP for videos? I’d very much like if mp4/oog/webm ones existed (and supported most codecs), but anyone knows any open source libraries that do this for at least any format/codec?