That's excellent, and well filmed, for this purpose, so well done. There is, however, a problem with the tuning. The low 'E' (the sixth string...) is OK, but all the other strings are tuned too low. It may be easy to fix, if you do the following...
Play the 6th string (the low 'E'...) at the fifth fret. This note will be 'A', and the 5th string should be tuned to that note. Tune up the 5th string, then, until the 6th string/5th fret and the 5th string 'open' sound the same note ('A'...).
Once that is done, play the 5th string at the 5th fret (the note is 'D'...), and tune up the 4th string, open, until it is that same note. Once that's done, you can check you're on track by playing the 6th string 'open', followed by the 4th string, 2nd fret ('E', an octave higher in pitch...).
Assuming it's all good, we continue by playing the 4th string at the 5th fret ('G'...), and tune up the 3rd string to that same pitch. Once again, we can check that the 'open' 5th string and the 3rd string, 2nd fret sound the same note ('A'...) an octave apart.
Now for the tricky one (not really, but it changes slightly here...).
Play the 3rd string at the 4th fret ('B'...) and tune up the second string to match that note.
Now for the last one : play the 2nd string, 5th fret ('E'...) and tune up the 1st string to that same pitch (the high 'E'...).
If you now play the 6th string 'open', followed by the 4th string, 2nd fret, then the 1st string 'open', you should hear a low 'E', and 'E' an octave higher, then the high 'E'.
Read this through again carefully, and try it out; reply here once it's done, or if you have questions or issues. From there, once successful, we can start looking to chord shapes and how to finger them. Firstly, though, the guitar must be tuned as described above. Over to you, and well done, again.
Douglas