Adjustments to the one script and modification to another script PHP/CSS

I need some adjustments to the one script and modification to another script: For the first script I need: 1. 1. Instead of Upload button: [login to view URL] to be Drag/Drop/CLick cloud just like it is on my second script/website so that users can drag/drop multi subtitle files at once, check it: [login to view URL] I will provide you the code for that , [login to view URL] and [login to view URL] is also in my script. 2. I modified the Loader in the script instead of: <div class="sk-chase"> <div class="sk-chase-dot"></div> <div class="sk-chase-dot"></div> <div class="sk-chase-dot"></div> <div class="sk-chase-dot"></div> <div class="sk-chase-dot"></div> <div class="sk-chase-dot"></div> </div> I added : <div class="sk-folding-cube"> <div class="sk-cube1 sk-cube"></div> <div class="sk-cube2 sk-cube"></div> <div class="sk-cube4 sk-cube"></div> <div class="sk-cube3 sk-cube"></div> </div> And everything is fine until the website is accessed via a mobile phone, I found that the loader is not responsive or something, if you could fix it to be normal access via mobile phone. For the second script , my website is about translating/editing subtitle files and on this script it is only possible to translate/edit srt subtitle file format, I need modification so that can be translated/edited formats: sbv, sub, vtt, stl, ass and srt. My website support saving the srt subtitle files into the database and I want to stay that way and if someone try to save some other file format to the database that message pop-up saying "Only SRT files can be saved to the database".