Good day!
I took a look at the links you provided (the Kaltura "Getting Started" for Developer) and it shouldn't be a great deal for me. As for the rest (Upload the audios & videos and copy web app), consider it done.
I am a WordPress Developer (Theme/Plugin) with more than 4 years of experience in Front-end Web Development (HTML, CSS, JavaScript, PHP, and Bootstrap framework, etc). I am also a Linux Engineer.
Please feel free to contact me, if you need more details about my approach.
Thank you for this opportunity; I hope to speak with you soon.