This is pure entertainment, nothing more or less. Hammed-up posturing for those watching from their survival sofas. For goodness sake don't take it to be educational! Taking some of the advice in this programme might actually be dangerous.
Factual? Not where it really matters in the Scottish high lands - navigation. Following the advice on navigation given here could lead people into much worse situations than they might already be in.
The old myth that moss grows best on the north side of rocks (or trees)is just that - a myth. It grows where the conditions are best for it, and they are likely to be on any aspect ("Trust me, I'm a botanist").
As for using wind, in the hills it is notoriously fickle and forecast wind directions are often modified locally by the surrounding landscape.
The worst advice was following streams off the high ground. This is very likely to lead you to the steepest slopes, waterfalls and into gorges, just as BG discovered. Water follows the easiest route! Artistic license for dramatic effect, or didn't BG know that?
Nice watch, nice penknife, nice waterbottle, nice paracord bracelet (or was it his waterbottle strap?)- but no compass... Hmm...
Other bits and pieces were laughably simplistic - do-it-yourself avalanche assessment (no mention of corniche formation at the top of slopes?) and scree running, for instance.
Granted, in a survival situation Bear may probably starve more slowly than the average person, but to be safe in the hills of Scotland real skills (especially navigation, navigation and, oh yes, did I mention navigation?) are required. If you are genuinely interested in getting yourself into the Scottish hills, Google for Mountain Leader Training Scotland (no I haven't done that training myself, but I have had to rely on those who have).