If you're asking whether mediathek.sonnenklar.tv is safe to use, the short answer is that it's a legitimate part of the sonnenklar.tv travel brand in Germany. The site is a media library featuring travel videos, live streams, and TV content — not a direct booking platform. That's an important distinction because it means you're not handing over payment details here. Instead, you'll find links to the main sonnenklar.tv travel website for bookings.
For a travel media site, the signals are reassuring. The operator has published a full Impressum with a registered business address, which is a legal requirement in Germany. There's also a privacy policy and cookie settings. The security headers are properly configured, and the site uses HTTPS. One thing to note: the domain's WHOIS information is hidden, and there's no snapshot in the Wayback Machine, so the subdomain doesn't have a long public history. But the parent brand is well established.
If you're wondering about mediathek.sonnenklar.tv reviews, there aren't many independent ones since it's a niche media section. The lack of a Trustpilot profile is normal for a site like this. My advice: enjoy the videos, but when you click through to book a trip, make sure you're on the main sonnenklar.tv site and verify its own trust signals. That's the standard caution for any travel-related website.