To the right we have the staff with a treble clef and time signature.  In this example it is called Three Four time.

C represents Common time which is also known as 4/4.  The measure to the right has a whole note rest in it to signify not to play anything for 4 beats (in this case 1 measure) and has a final bar line at the end to signify the end of a piece of music.

In this example we have two measures divided by a bar line with each of these measures having a whole note rest in them.  So in this example you wouldn't play anything for 8 beats (in this case 2 measures).

0:18 - 0:44
The whole note is held for the value of the bottom number in the time signature. In 4/4 or Common time the bottom number is 4 and so the whole note is held for 4 beats. Because the top number is also 4 we can only have 4 beats in a measure. Since the whole note is worth 4, we can't fit anything else in this measure.

You can play this A on the 2nd fret of your 3rd string or 7th fret of your 4th string or 12th fret of your 5th string.  Those would all be the same pitch.

0:45 - 0:52
The half note is worth half of the whole note.
So if the whole note is worth 4 beats, the half note is worth 2. As long as the top number is 4, we can have 4 beats which means we can put 2 half notes in the measure.

0:53 - 0:58
The quarter note will be worth half of a half note. So in the case of 4/4 where the half note was worth 2, the quarter note will be worth 1 and we could have 4 in a measure.

0:59 - 1:08
The eighth note is worth half of the quarter note. Which means it is only worth half of a beat.  Two connected together would be worth 1 beat and we could put a total of 8 in a measure.

1:09 - 1:16
The sixteenth note will be worth half of an eighth note. So a single sixteenth note in 4/4 time would only be worth 1/4 of a beat. You could play 4 sixteenth notes in one beat and 16 in a measure.

2:14 - 2:22
To the right is a whole note written for a chord chart.  In 4/4 time we will hold this for 4 beats.  So without a chord written above we don't know what to play.  Only that whatever it is will be held for 4.

2:23 - 2:28
To the right are two half notes worth two beats each in 4/4.  So in this case we will hit them  on beat 1 and 3.

2:29 - 2:32
Notice I have included down strokes above the chord chart.

2:33 - 2:43
We count these eighth notes like:  1 & 2 & 3 & 4 &.

In this example we will play up and down strokes.  So note that when you were playing quarter notes you were playing all down but you had to come back up in between the down strokes.  Now you just have to catch the strings on the way back up.

2:44 - 2:47
We will count sixteenth notes:  1 e & a

3:54 - 4:34

Now let's take all this above info and learn a strum pattern!  This is an easy one with two quarter notes on beat 1 and 2 and then four eighth notes making up beats 3 and 4.

4:35 - to end

This pattern is similar to pattern 1 but we have now moved the four eighth notes to beats 2 and 3!  We will work on speeding this pattern up.