We do not have any file type or file size limits when uploading via FTP. If you upload file using PHP (instead of FTP), max file size limit is 128 MB for Single and Premium and 256 MB for Business plan users. Also, we have a file size limit of 32MB when uploading files via the file manager in control panel. Currently, these limits can not be increased anymore.
If your file is very large, it might be that web-based upload could fail, so we strongly suggest uploading big files with an FTP client.
A detailed guide on how to use an FTP client can be found here: https://www.hostinger.com/tutorials/ftp/filezilla-ftp-configuration