When uploading a image, laravel goes through everything fine and dandy. No dramas. as soon as I upload a video file, nope. Pops up with:.
TokenMismatc
According to your update, you said, "Laravel had a issue with file size".
"Laravel had a issue with file size"
If that the case, I don't think is Laravel. It's your PHP configuration.
Have you update these directives in your php.ini file to fit your need.
upload_max_filesize = 100M post_max_size = 100M