Actually, no. The above is a recording of an early Sibelius work, one that he withdrew after publishing. It’s kind of like The Beatles with Tony Sheridan album. Kullervo has its fans but I’m not among them. If you are new to Sibelius I recommend exploring the following.
Tone Poems (Basically works for Orchestra that aren’t Symphonies or Concertos): Finlandia, Tapiola,The Swan of Tuonela, En Saga
Symphonies 1-7. Number 5 might be the most immediately accessible
Violin Concerto
@designsfx if you have a streaming service you can easily explore many recordings of all of the above
The conductor in the recording you referenced is named Osmo Vanska. He irecords for the label BIS. BIS hired him to record every note the Composer ever wrote for Orchestra, back in the nineties, with a relatively small Orchestra from the city of Lahti. He subsequently became the Conductor of the Minnesota Orchestra, and BIS is re recording much of the Sibelius this time in SACD.
As you can tell from the other posts in the thread there are many other Conductors that have recorded Sibelius. Another excellent place to start would be Herbert von Karajan and the Berlin Philharmonic in the four tone poems that I listed above
if you need more help don’t be afraid to ask.