Our platform converts all subtitle files to ".vtt" format. Therefore you will have to use WebVTT styling cues to do subtitle styling.
You can use this website https://chromecast.smplayer.info/convert-srt-to-vtt/ to move subtitles to the top
Here are the steps :
Upload the SRT file to this website
Set the "Encoding" as "Western European language (ISO-8859-1)" (This can change depending upon what type of encoding profile you want to choose)
Set "Position of subtitles on screen" value to 0 --> This will push the subtitle to the top.
Output format --> Choose VTT
Now upload the converted VTT file to the movie.