No sham. The sideloading whining is actually a misnomer for downloading .apk files from non-BN sources.
Your movies on SD cards work quite well. I'd strongly suggest investing the extra $2 in the Movie Gallery app, which makes it very easy to find all your movies on both the internal and SD memory as well.
Yep sideloading issue applies to apps only.
Still can sideload Movies,eBooks,Pictures,Music,etc..
Dvd catalyst 4 works great. And plays great and that is just on my Nook Color so the Tablet should be even better.