Could do a check of demos.tf and try to find the account of a player that participated in the tournament, or you could do the same through sizzlingstats. Other than this, it's down to finding a person with the download link.

On the esea match page

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First they take away STV's, now they're taking away demos

You're fucked then, in a lot of the matches in the last few seasons the stvs have either been completely down or otherwise broken so there's no option to download certain ones (i.e., games where shade had to view a steam broadcast cause stv was down). It appears that since the first map of the bo3 had the stv issues that the other ones did as well even though you could watch them live.
You could ask players in the match for pov demos because esea automatically records them but they may not give them to you.