What I can glean from the short clip is this:

- there is a rocket launched at around 0:08 from a valley nearby the skateboarder with the camera

- you can hear the noise of that rocket almost instantaneously, so the distance is not very high, maybe a few kilometers at most.

- we can't see when the interceptor is launched, but I see it chasing the first rocket closely around 0:13, so the interceptor must've been launched almost at the same time as the first rocket

- at 0:24 the first rocket tries an evading maneuver, a sharp turn

- the interceptor is not fooled, follows closely, and the detonation appears to happen at 0:25. I am not completely sure, but it appears you can see the plume a few seconds later

- the camera follows back the smoke trails (or maybe contrails?) and the two rockets appear to have started from virtually the same place

- neither rocket appears to have two stages

This could be consistent with either an exercise (for example to test how an interceptor performs when the target takes evasive actions), or a staged show of military capabilities (better show you carry a big stick than actually use it), or a real interception of a rocket launched from the Syrian-Israeli border (this explains the proximity: the Syrian battery is located near the border, but so is the Iron Dome battery too).

Anyway, here's the wikiepdia short entry [1]

"On 21 January 2019, the IDF released footage online of a Syrian Arab Army rocket attack on the Golan Heights being intercepted by Iron Dome. The video was shot by skiers at Mount Hermon ski resort; Israeli authorities announced that the resort was closed until further notice The attack as in response to Israel's launching of nine rockets at SAA targets in western Damascus.[106][107][108]"

[1] https://en.wikipedia.org/wiki/Iron_Dome#Mount_Hermon_video