jTube
JTube. Unofficial YouTube client based on Invidious API.
Allows you to watch videos on Symbian and Java-enabled devices (S40, SE, Samsung, etc.)
Can browse channels, playlists, download videos to device memory and select video quality.
Also well optimized in memory consumption, without images can fit in 512kb of Java memory.
Download: JAR, JAD, Samsung Ver, BlackBerry Ver
SymTube
SymTube is an application for S40/Symbian/Bada/Blackberry/Windows Mobile platforms that allows you to comfortably use YouTube video hosting on obsolete devices.
Possibilities - search and watch videos in the highest possible quality for the phone (for Symbian Belle up to HD 720p, on weaker devices 240p, which is in any case higher than in Opera Mini).
So far, raw to the point of ugliness in terms of excessive consumption of phone RAM, which sometimes prevents it from working adequately on weak non-Symbian devices
Download: Jar