Optionally allow provision of starting and ending point for playlists in batch file

[tjeulink]

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What i would really like is to have the ability to specify per playlist in the batchfile what video to start and end with. it shouldn't be a mandatory option but it should be a given one. it could be implemented like this (imagine this is the batch-file.txt:

https://www.youtube.com/watch?v=HIXzJ3Rz9po
https://www.youtube.com/watch?v=_gCwCOhMcog&list=PLD6B6473ACF32C59D
https://www.youtube.com/watch?v=HjuHHI60s44&list=PL6gx4Cwl9DGCkg2uj3PxUWhMDuTw3VKjM --playlist-start 5
https://www.youtube.com/watch?v=FVOmSC2fCaE&list=PLY-M-dfKubpeXJHxjYoarxYSBPUd8u63M --playlist-end 20
https://www.youtube.com/watch?v=b5NmtmNwMgU&list=PLW5y1tjAOzI2ZYTlMdGzCV8AJuoqW5lKB --playylist-start 5 --playlist-end 20
https://www.youtube.com/watch?v=v_1zB2WNN14&list=PL9ooVrP1hQOH3SvcgkC4Qv2cyCebvs0Ik --playlist-items 1,3,5,7,9

what this would do is:
url 1: download single video normally
url 2: download full playlist
url 3: download playlist starting at video 5
url 4: download playlist till video 20
url 5: download playlist from video 5 till video 20
url 6: download video's 1, 3, 5, 7 and 9 from the playlist

another thing that would be nice is to be able to specify if it should only download the playlist from the video linked. for example (imagine another batch file):

https://www.youtube.com/watch?v=LLKzoG_Db4g&index=4&list=PLbzoR-pLrL6rr4Yn46TYDee--jzHhqdfQ --arbitrary-command-feel-free-to-think-of-something

what this would do is:
download video 4 and every video after it.

this last one would be mainly usefull for me, but i figured that if i was going to do a suggestion it would be better to suggest the whole package to make a completer suggestion. Hope this was clear enough!

ps. i love its current state too, its amazing.

[dstftw]

Syntax proposal is ambiguous since space is a valid URL character.

[tjeulink]

it was more to illustrate what i meant than as a set idea that should be implemented that way :)

[hseg]

Note that "<>\^{|}` are forbidden in URIs, so they could be used as separators between the URI and the associated parameters. Or we could go the aria2 route and use a syntax like

URI
  param-1
  param-2
URI
  param-j
  param-k

Just my two cents.