Subtitles in the videos of the lessons

Hello everyone, I am trying to add the subtitles of the tutorial videos that come in .srt format but I can not find a way to do it. Can someone help me with this? and do you know if there are subtitles for level 1 and the following? Thanks in advance

Please check whether it violates any copy rights ?

The videos already bring so you can download the subtitles in. srt format