Newbie ..sandbox setup help

ssj100 wrote:Even if it's possible for them to execute by themselves, my security setup (at least back on Windows XP) had an anti-executable component to it (SRP).

Have you heard of cases where they can execute by themselves.
eg. say straight after removing contents from SBIE?
Is it actually possible?

ssj100 wrote:But if you're downloading and recovering specific files (eg. video/music files) out of the sandbox and into this Downloads folder, I really can't see how they can spontaneously execute when you're not even viewing (reading) them unsandboxed.

At the moment I am not viewing video/music files sandboxed; for safety should I? I download them Youtube.
Does Google scan uploaded videos and eliminate the malware? Is it safe to presume the downloads are
safe cause its from Youtube?

Not sure if it's possible. Up to you about how "safe" you want to be.