The public may know, probably many who do not know ....you can also create and modify Subtitle
to make it, you can use Subcreator, download here
Here are the key words to facilitate the construction of subtitle ...
Ctrl + spacebar = start video / video pause
Ctrl + A = Submission timeline
Ctrl + Z = Undo
Write down what needs to be ready to play then (ctrl + spacebar). During video play press ctrl + a timeline to include the part where you want in subtiltle
That it's!