Save the .srt file to the same folder as your video.
Because this is the version, standard subtitles for the theatrical release will not work. The timing will fall out of sync due to the added scenes, such as the prehistoric prologue. Common File Sources subtitle Jurassic.World.III.2022.EXTENDED.BRRip...
Open the video in a player like VLC or MPC-HC ; it should load the text automatically. Save the