2
1) the problem you have is probably because you use Ukrainian language for XOOPS, but don't have Ukrainian translation for the module.
In order to make it look in English, till you finalize the translation, just copy the /xoopstube/language/english
to
/xoopstube/language/ukrainian
This way at least you'll have the English words.
2)
This site is running XoopsTube on
XOOPS 2.5.8, and for the most part there are no issues. Other modules include: Publisher, NewBB, extCal, extGallery, Contact, Gnavi from XOOPS Japan for local links. The only issue I saw was with SmartPartner, but I'll be looking into it later today.