1. frame = 30
when
filming making editing always
2. screen size
16 : 9 1.77 : 1
2160p: 3840 x 2160
1440p: 2560 x 1440
1080p: 1920 x 1080 high quality
720p: 1280 x 720 little bit good
480p: 854 x 480 normal
360p: 640 x 360 low quality
240p: 426 x 240 I don't recommend
3. put tag when youtube upload
yt:stretch=16:9
yt:quality=high
4. do not upload a raw video
that has a hundred MB
it's laggy
at least convert
convert to mp4
or wmv or mpg
5. if sending video source to other site
and if wanna start video high quality without click
put below thing end of link
?vq=large ( 480p )
or
?vq=hd720 ( 720p)
<iframe width="560" height="315" src="//www.youtube.com/embed/dM5cdkqNqm0" frameborder="0" allowfullscreen></iframe>
source link
https://support.google.com/youtube/answer/1722171?hl=en
https://support.google.com/youtube/answer/146402?hl=en
https://support.google.com/youtube/answer/58134?hl=en&ref_topic=2888603
http://stackoverflow.com/questions/7582336/force-youtube-embed-to-start-in-720p
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