Doing two Bachelors before Masters degree? I currently study for my B.Sc. in Media IT. I easily could finish a second Bachelor if I do one more semester. I want to do master's degree in Media IT afterwards.

I'm already 23 and in the third semester, since I finished an apprenticeship as a software developer before. Is it useful to start my master's with 26 and probably finish it when I'm ~28?
Giving a perfect advice is not possible, but consider:
Those skills are searched for, a semester more could be explained. You should bevable to do so, ideally by being able to show your learnings applied. Any projects in parallel? When asked, mention them. Show why a good knowledge plus experience makes you different.
I ended my university diploma in CS when i was 27, and added a PhD afterwards. I never regretted learning more by drilling some deeper holes than usual. And from the afterwards jobs, I got really well paid.