2- The url is correct and it does not redirect to infinityfree 403 error page
it just make a refresh to the current page [ login and try ]
you just see that because you not logging in
There’s an error in the POST request and it shows that you’ve been attempting to use exec() function (probably a ffmpeg command right there i believe)
<br/><b>Fatal error</b>: Uncaught Error: Call to undefined function exec() in /home/vol14_5/infinityfree.com/if0_35736190/welcome2.my-board.org/htdocs/core/libs/ffmpeg-php/src/FFmpeg.php: 490 Stack trace: #0/home/vol14_5/infinityfree.com/if0_35736190/welcome2.my-board.org/htdocs/apps/native/ajax/main/content.php(166): FFmpeg->ready()#1/home/vol14_5/infinityfree.com/if0_35736190/welcome2.my-board.org/htdocs/api.php(56): require_once('/home/vol14_5/i...')#2{
main
}thrown in<b>/home/vol14_5/infinityfree.com/if0_35736190/welcome2.my-board.org/htdocs/core/libs/ffmpeg-php/src/FFmpeg.php</b> on line <b>490</b><br/>
However, the function is disabled on free hosting for security considerations. You should consider only allow uploading mp4s, however there are far more considerations when dealing with videos and unfortunately a free hosting isn’t going to enable you to do that.
A video-enabled social media requires video encoding features on the server, or by using an encoding service via REST API, ideally with cron jobs available.