What makes this Beatles' song so psychedelic?

The Beatles - Lucy in the Sky with Diamonds: A detailed look at what makes this song work so well.

NOTE: I have re-released this video to fix some glitches in the original upload.

00:00 - Intro
00:44 - 1. Structure
01:22 - Basic repeated pattern: verse, pre-chorus, chorus
01:54 - Recurring patterns and thought loops: breaking the cycle
02:43 - 2. Instrumentation
03:05 - Intro instrumentation: the organ riff
04:25 - Verse instrumentation
06:01 - Pre-chorus instrumentation
08:35 - Chorus instrumentation
10:39 - Consistent instrumentation between repeated sections
10:51 - McCartney's evolving bass part
13:55 - 3. Chords
14:09 - Verse chords
14:25 - Borrowed chords
14:33 - Augmented F chord
15:28 - Transition from verse to pre-chorus
16:52 - Pre-chorus chords: Bb major key or F major key?
18:16 - Transition from pre-chorus to chorus
19:15 - Chorus chords: D major key?
19:58 - Chorus chords: G major key?
20:57 - Chorus chords: D mixolydian mode? (a compromise between D major and G major)
21:36 - Time spent on each chord: Where do we rest?
21:55 - Swapping the bVII chord for chord V
22:48 - How beginning sections in new keys on chords other than chord 1 is psychedelic
23:54 - 4. Time signatures
24:08 - 6/8 time
24:31 - 3/4 time
25:08 - Switch to half time: A musical depiction of time dilation?
26:00 - 5. Lyrics: Speculation about the subject of song and the meaning of the enigmatic title
26:33 - Connection to Lewis Carroll and 'Alice's Adventures in Wonderland'
27:34 - Surely there is some connection to psychedelic substances, right?
28:37 - Creators' intentions VS what art becomes once released to the world
29:11 - 6. Genre: What makes a song psychedelic? (Defining the psychedelic music genre)
32:12 - The elements of the song that appeal to mainstream audiences
32:43 - Song structure and start times of sections
32:56 - Song Challenge!
33:09 - Thinking of the psychedelic genre as a continuum

Video chapters:
1. Song structure (intro, verse, chorus, bridge, etc)
2. Instrumentation (how different combinations of instruments are used and why)
3. Chords
4. Time signatures
5. Lyrics
6. Genre

Target audience:
1. This video is designed so that people with little musical background who just love the song ('Lucy in the Sky with Diamonds') can gain a deeper appreciation for how their favourite songs work. Unfamiliar musical concepts are broken down and explained using audio and visual examples.

2. This video will be particularly useful for musicians and songwriters who want to improve their songwriting skills by understanding how to manipulate a variety of musical elements to make a song great.

Some of the musical concepts covered in this video include:
-parallel keys
-borrowed chords / modal mixture
-time signatures
-key changes
-defining a genre

Lucy in the Sky with Diamonds – The Beatles
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