By default Youtube applies some filter to a latest subscription video list that displays only 1 latest video per subscribed channel or something like that. So if one subscripiton has 10 videos only 1 latest will be added to the mix.
How to see all latest videos from all my subscriptions in reverse chronological order?
Best Answer
Channels on YouTube have RSS feeds, so subscribe to all of your favourite channels' RSS feeds in Google Reader (or another online feed reader).