Motorola Triumph :: Playing Videos On PC And Temp File Icons?

1) I have recorded a couple of videos with my phone, They have sound when played on the phone but when transferred to my computer the sound is suddenly not there anymore. What has gone awry?

2) While the Triumph has way more memorythan my OV had I am finding myself hovering around the 30% point on the actual phone memory. When I imported my pic and video files to my computer from the phone tons of non-pictures (attachments, logos from sports teams who pages I might have opened once, twitter and facebook logos, logos from various apps, attachments from emails etc) showed up in the photo file on the computer. Could this be what is causing some of the issues? I am cleaning the cache quite regularly and 84% available on the SD card still (and it is still the one that came with the phone). And if it is part of the cause how do I get it to quit saving all of these things? I also can't seem to find where they are on the phone right now (tried using the Android Assist file manager).