TubEmAll:

YTBuddy is a small program that will continuously check the 20 newest vids in your subscriptions list and will download the ones u are missing, thumbnails included.
But there is more: when enabled YTBuddy will download also the 25 most popular tinypic vids

Download (main executable only, no dlls provided, if you need them download the tubemall installer)

Usage
1) Fill the Login and Password field (leave them empty if you only want the tinypic vids)
2) Set the delay (default value is 5 minutes)
3) Check 'Tinypic' if you want to monitor Tinypic too.
4) Set the number of Tinypic pages you want to monitor, if any
5) Set a rollback value if needed.
6) Set the desired video format: flv or mp4 (better quality)
6) Click Start and go to sleep ;)

Command line options:
-L yourusername -> sets the youtube login
-P yourpassword -> sets the youtube password
-D # -> sets the delay to # minutes (optional)
-R # -> sets the youtube rollback for # pages (optional)
-T # -> sets the tinypic most popular monitor on for # pages (optional)
-Q # -> sets the desired video format: 1 = flv, 2 = mp4 (optional)

Sample shortcuts:
C:\YTBuddy\YTBuddy.exe -L mylogin -P mypassword
will monitor youtube subscriptions with the default 5 minutes delay and 0 pages of rollback, tinypic monitor is disabled.

C:\YTBuddy\YTBuddy.exe -L mylogin -P mypassword -T 2 -D 6
will monitor youtube subscriptions with a 6 minutes delay and 0 pages of rollback, tinypic monitor is enabled on the first 2 pages of most popular videos.

About the new Youtube rollback feature
By default YTBuddy will check only the first subscriptions page with the 20 newest vids but sometimes (e.g. after a crash) it may be handy to check additional pages to get older videos. The rollback value is the number of additional pages you want to check, so if you set it to 2 YTBuddy will download the newest 60 videos instead of the usual 20. This value will affect only the first check.

This software is in a beta stage, please report any bug here