[Nexus 6P General] walrusmonarch:
Well I checked some videos I took with MediaInfo:

1080P:

Format : MPEG-4

Format profile : Base Media / Version 2

Codec ID : mp42

File size : 102 MiB

Duration : 49s 899ms

Overall bit rate : 17.1 Mbps

Encoded date : UTC 2015-11-01 20:28:09

Tagged date : UTC 2015-11-01 20:28:09

©xyz : +32.1937-110.8210/

com.android.version : 6.0

Video

ID : 1

Format : AVC

Format/Info : Advanced Video Codec

Format profile : Baseline@L4

Format settings, CABAC : No

Format settings, ReFrames : 1 frame

Format settings, GOP : M=1, N=31

Codec ID : avc1

Codec ID/Info : Advanced Video Coding

Duration : 49s 636ms

Source duration : 49s 663ms

Bit rate : 17.0 Mbps

Width : 1 920 pixels

Height : 1 080 pixels

Display aspect ratio : 16:9

Frame rate mode : Variable

Frame rate : 29.922 fps

Minimum frame rate : 16.426 fps

Maximum frame rate : 40.036 fps

Color space : YUV

Chroma subsampling : 4:2:0

Bit depth : 8 bits

Scan type : Progressive

Bits/(Pixel*Frame) : 0.274

Stream size : 100 MiB (99%)

Source stream size : 101 MiB (99%)

Title : VideoHandle

Language : English

Encoded date : UTC 2015-11-01 20:28:09

Tagged date : UTC 2015-11-01 20:28:09

Color range : Full

Color primaries : BT.601 PAL

Transfer characteristics : BT.601

Matrix coefficients : BT.601

mdhd_Duration : 49636

Audio

ID : 2

Format : AAC

Format/Info : Advanced Audio Codec

Format profile : LC

Codec ID : 40

Duration : 49s 899ms

Bit rate mode : Constant

Bit rate : 96.0 Kbps

Channel(s) : 1 channel

Channel positions : Front: C

Sampling rate : 48.0 KHz

Compression mode : Lossy

Stream size : 585 KiB (1%)

Title : SoundHandle

Language : English

Encoded date : UTC 2015-11-01 20:28:09

Tagged date : UTC 2015-11-01 20:28:09

4K:

Format : MPEG-4

Format profile : Base Media / Version 2

Codec ID : mp42

File size : 104 MiB

Duration : 20s 928ms

Overall bit rate : 41.6 Mbps

Encoded date : UTC 2015-11-01 20:28:50

Tagged date : UTC 2015-11-01 20:28:50

com.android.version : 6.0

Video

ID : 1

Format : AVC

Format/Info : Advanced Video Codec

Format profile : Baseline@L5.1

Format settings, CABAC : No

Format settings, ReFrames : 1 frame

Format settings, GOP : M=1, N=31

Codec ID : avc1

Codec ID/Info : Advanced Video Coding

Duration : 20s 643ms

Bit rate : 41.9 Mbps

Width : 3 840 pixels

Height : 2 160 pixels

Display aspect ratio : 16:9

Frame rate mode : Variable

Frame rate : 29.501 fps

Minimum frame rate : 14.935 fps

Maximum frame rate : 32.491 fps

Color space : YUV

Chroma subsampling : 4:2:0

Bit depth : 8 bits

Scan type : Progressive

Bits/(Pixel*Frame) : 0.171

Stream size : 103 MiB (99%)

Title : VideoHandle

Language : English

Encoded date : UTC 2015-11-01 20:28:50

Tagged date : UTC 2015-11-01 20:28:50

Color range : Full

Color primaries : BT.601 PAL

Transfer characteristics : BT.601

Matrix coefficients : BT.601

mdhd_Duration : 20643

Audio

ID : 2

Format : AAC

Format/Info : Advanced Audio Codec

Format profile : LC

Codec ID : 40

Duration : 20s 928ms

Source duration : 20s 934ms

Source_Duration_FirstFrame : 6ms

Bit rate mode : Constant

Bit rate : 96.0 Kbps

Channel(s) : 1 channel

Channel positions : Front: C

Sampling rate : 48.0 KHz

Compression mode : Lossy

Stream size : 245 KiB (0%)

Source stream size : 245 KiB (0%)

Title : SoundHandle

Language : English

Encoded date : UTC 2015-11-01 20:28:50

Tagged date : UTC 2015-11-01 20:28:50

mdhd_Duration : 20928

120:

Format : MPEG-4

Format profile : Base Media / Version 2

Codec ID : mp42

File size : 18.4 MiB

Duration : 29s 268ms

Overall bit rate : 5 273 Kbps

Encoded date : UTC 2015-11-01 22:36:05

Tagged date : UTC 2015-11-01 22:36:05

©xyz : +32.1937-110.8211/

com.android.version : 6.0

Video

ID : 1

Format : AVC

Format/Info : Advanced Video Codec

Format profile : Baseline@L3.1

Format settings, CABAC : No

Format settings, ReFrames : 1 frame

Format settings, GOP : M=1, N=31

Codec ID : avc1

Codec ID/Info : Advanced Video Coding

Duration : 28s 266ms

Source duration : 28s 274ms

Bit rate : 5 245 Kbps

Width : 1 280 pixels

Height : 720 pixels

Display aspect ratio : 16:9

Frame rate mode : Variable

Frame rate : 29.603 fps

Minimum frame rate : 15.000 fps

Maximum frame rate : 30.080 fps

Color space : YUV

Chroma subsampling : 4:2:0

Bit depth : 8 bits

Scan type : Progressive

Bits/(Pixel*Frame) : 0.192

Stream size : 17.7 MiB (96%)

Source stream size : 17.7 MiB (96%)

Title : VideoHandle

Language : English

Encoded date : UTC 2015-11-01 22:36:05

Tagged date : UTC 2015-11-01 22:36:05

Color range : Full

Color primaries : BT.601 PAL

Transfer characteristics : BT.601

Matrix coefficients : BT.601

mdhd_Duration : 28266

Audio

ID : 2

Format : AAC

Format/Info : Advanced Audio Codec

Format profile : LC

Codec ID : 40

Duration : 29s 268ms

Bit rate mode : Constant

Bit rate : 96.0 Kbps

Channel(s) : 1 channel

Channel positions : Front: C

Sampling rate : 48.0 KHz

Compression mode : Lossy

Stream size : 343 KiB (2%)

Title : SoundHandle

Language : English

Encoded date : UTC 2015-11-01 22:36:05

Tagged date : UTC 2015-11-01 22:36:05

mdhd_Duration : 29268

240:

Format : MPEG-4

Format profile : Base Media / Version 2

Codec ID : mp42

File size : 40.6 MiB

Duration : 1mn 5s

Overall bit rate : 5 217 Kbps

Encoded date : UTC 2015-11-01 22:36:20

Tagged date : UTC 2015-11-01 22:36:20

©xyz : +32.1935-110.8207/

com.android.version : 6.0

Video

ID : 1

Format : AVC

Format/Info : Advanced Video Codec

Format profile : Baseline@L3.1

Format settings, CABAC : No

Format settings, ReFrames : 1 frame

Format settings, GOP : M=1, N=31

Codec ID : avc1

Codec ID/Info : Advanced Video Coding

Duration : 1mn 3s

Bit rate : 5 247 Kbps

Width : 1 280 pixels

Height : 720 pixels

Display aspect ratio : 16:9

Frame rate mode : Variable

Frame rate : 29.509 fps

Minimum frame rate : 3.333 fps

Maximum frame rate : 30.000 fps

Color space : YUV

Chroma subsampling : 4:2:0

Bit depth : 8 bits

Scan type : Progressive

Bits/(Pixel*Frame) : 0.193

Stream size : 39.5 MiB (97%)

Title : VideoHandle

Language : English

Encoded date : UTC 2015-11-01 22:36:20

Tagged date : UTC 2015-11-01 22:36:20

Color range : Full

Color primaries : BT.601 PAL

Transfer characteristics : BT.601

Matrix coefficients : BT.601

mdhd_Duration : 63133

Audio

ID : 2

Format : AAC

Format/Info : Advanced Audio Codec

Format profile : LC

Codec ID : 40

Duration : 1mn 5s

Source duration : 1mn 5s

Bit rate mode : Constant

Bit rate : 96.0 Kbps

Channel(s) : 1 channel

Channel positions : Front: C

Sampling rate : 24.0 KHz

Compression mode : Lossy

Stream size : 766 KiB (2%)

Source stream size : 766 KiB (2%)

Title : SoundHandle

Language : English

Encoded date : UTC 2015-11-01 22:36:20

Tagged date : UTC 2015-11-01 22:36:20

mdhd_Duration : 65320