Dunno, but very often links have "how you got here" information embedded, which you can delete without risk:
Here's Steve's latest, in its simplest form:
https://www.youtube.com/watch?v=NWz64eeVbwQ
It's fairly simple to decode. after the basic URL,
- /watch? - should be self-evident, but the "?" indicates the start of one or more "attribute=value" pairs. In this case there's only one pair.
- v=NWz64eeVbwQ The aforementioned attribute=value.
In this case "v" (the "attribute") means 'video'.
"NWz64eeVbwQ" is the 'value', the identifier ("ID") of the video itself. Note that it's case-sensitive, and has eleven letters and numbers because YT has so many uploads (numbers alone would be unmanageable). This is the important bit. It identifies the wanted video and will always be there (assuming the link works).
Now let's find it via a Google search for "Foolproof grinding station". Note that I'm using Google search to do this (how you search makes a difference):
https://youtu.be/NWz64eeVbwQ?si=7K0tH935aTMX0e7E
For a start the actual URL is different: youtu.be That's essentially just a slightly shortened URL (Google owns both youtube.com and youtube.be).
This time, also the ID
NWz64eeVbwQ is straight on the end of the video, but there's still an attribute=value thing at the end:
?si=7K0tH935aTMX0e7E
It's got the same syntax as before: "?" denotes the start of a set of attribute=value pairs (and again there's just one). I'm guessing that "si=7K0tH935aTMX0e7E" tells the YouTube engine that the reference came from a Google search, but there are many, many attributes possible, depending on where you got the URL from, how it'll be used, etc. These strings of characters can get hugely long, and they're typically set by tracking cookies. If there's more than one pair, each is punctuated-off from the preceding ones by an ampersand ("&"), but the whole string of them starts with "?".
In short,
- whichever URL you use will get you to the same place (YouTube's normal play-one-video screen).
- you can delete anything in the link from immediately after the video's ID to the end, and it will still go to the right place.
There's only one other attribute=value pair I've ever found useful, which is specifying the point in the video where you want playback to start. here it is:
https://youtu.be/NWz64eeVbwQ?t=176 You can probably decode it yourself (hint: 't' is for time).
So
?t=176 stuck on the end tells YouTube to start playing from 2min 56secs into the video. That's 176 seconds in...
If you don't want to do the mental arithmetic
and you're at a PC, clicking the "Share" button will show you a checkbox (on the copy link option), that appends the start-point time automatically. But it adds some other tracking stuff too, so the link immediately above is constructed to omit that.
Hope that's helpful. I've omitted a lot of detail, but YouTube links can be tiny. And there's even a YouTube player function built into the forum's system, which you can use to embed a video. But to do that you need the video ID...