I tested the link via my blog on both desktop/laptop and mobile. Both worked. I'm watching the Markina Final on a mobile as I type this on my laptop. Connected through the blog on the mobile.
It can be a little tricky though. One thing I should have mentioned, and will in the blog from now on--you might try is to see if you can see a right arrow at the top left of your screen. If you see that and nothing happens, click on it. Or click on the small icon below that identifies the match. That should initiate the video, but you might have to click on another "go" button.You'll see it.
It is more cumbersome than Youtube, for sure. But it is what it is. They could make it a lot easier if they just opened a Youtube channel, but Jai alai is a microscopic part of all the sports they provide. EITB is one of the most incredible TV/Internet operations I have ever encountered. And, they listen. Markina is the 2nd time I have politely asked them if they will put up the video, and they have responded quickly, thanking me, both times. That is what you call customer service. Some joker who knows no Basque and comes in stammering with Google Translate Castilian. They are great!
Another way you might try is to simply go to:
http://eitb.tv/eu or http://eitb.tv/es
CUT AND PASTE
Look at the upper right. Where it says "Bilatu" or "Buscar" simply type in "Zesta Punta" (without the quotes). This will get you all the matches available. And you don't have to up my pageview count to do so. You can do this at any time. Above rules may still apply though, regarding the arrows.
NEXT MESSAGE WILL HAVE DIRECT MARKINA ADDRESS
THANKS FOR ALL YOUR FEEDBACK ON THIS. THE MAIN THING IS TO GET THE MATCHES TO YOU. HOPEFULLY, IT WILL BE EASIER IN THE FUTURE