Something that this admin keeps forgetting (I am very stupid)

Basically only important part is v=[video id] if you use an old style link, and t= if you wanna share starting from a set time (specifically amount in seconds)
In general, si and utp/utm tags are used for tracking, but that's not limited to that.

For the curious, an url with tags looks like this
https://www.example.com/path/page?tag1=value1&tag2=value2&tag3=value3, tags are after ? And separated by &

God damn poets, writing interesting things that people like!