1. You should also filter out porn using your keyword filter: Direct instructions to eliminate porn from results

2. Good files are going to be larger than 1,000 KB (1 MB) so ignore all those smaller.

3. The junk filter works well if you use it properly. It's a dynamic learning filter. You need to train it. If you add good files to it then it will become unreliable & you would need to tell it to undo all training from the LW option settings.

4. For tips on downlding videos; see Movie download issues