Question: how to attach srt file with video?
Answer: Open video file in Handbrake. Open the Handbrake application. ... 
Open SRT file in Handbrake. Now it's time to add your closed captions or subtitle tracks to Handbrake. ... 
Choose Burned-In For Open Captions. ... 
Export the Media File in Handbrake. ... 
Test the Subtitles in a Media Player.