If you are still looking, there is a rough guide to the pronunciation of different letter combinations here. If you prefer examples and rules, I have compiled the following, expanding on the comments made by epac-mcl and ThomasTQ. Please be aware I am not a native speaker or a qualified linguist. Corrections are welcome.
v = [v] • at start of a word and before vowels (i.e. vred 'angry', vejr 'weather', udvandring 'emmigration'); • between vowels (skrevet 'written', lave 'make'). Exceptions: some commons words below. • after most consonants, especially common are h, k, s (hvem 'who', kvinden woman, svare 'answer'). Exception: l, see below.
v = [w] (sometimes also [u], sounds more or less the same to us) • before most consonants (common ones are d, n, l, s; more rarely r, [note vred above]) or at end of word (i.e. savne 'miss', brev 'letter(s)'). This does not seem to apply if v is also at the beginning of the syllable/word. Exceptions below.
v = silent • after l (i.e. selv 'self'. Rare exceptions ulv 'wolf', selve inflected form of selv); • in rare, but extremely common words such as blive, have, including past tense havde which is pronounced the same a hade, 'hate'.
So, a simplified rule might be: v is [v] at start of a word, after consonants & between vowels but [w] before most consonants; v is silent after 'l' and in some common exceptions.
If you are still confused, it might be worth looking up each new word in a good online dictionary with recordings, and remembering this word. I recommend this one, even if the entries are in Danish, most words will have a sound file you can click on as well as a phonetic transcription of the word which you can use to compare different forms.
Hope that helps!
Not really (completely) correct, I'd say, sorry. For instance, in your "skrevet" and "lave" I only hear a [w] sound, never a real [v].
Furthermore, ordnet.dk seems to be quite unreliable, too. For example, "have" (garden) is said to have a [v] sound, whilst I only ever hear it pronounced with an unsyllabic u sound, or let's write it [w].
Which Danish word were you thinking of? I can't think of any which starts with a "v" and pronounced like a "w". On the other hand, there are absolutely very few words in Danish which begin with a "w", and these are mainly imported words from another language. You will hear these words pronounced with both "v" and "w".
No words starting with "v" is pronunced as a "w". On the other hand, many words borrowed from English starting with "w" is pronounced with a "v" sound, for instance weekend, web, and wok. But just as many start with the original "w" sound, like whiteboard or widescreen. There are no general rules, just ask a Dane.
I see that "det bliver interessant" does NOT mean "it is interesting", and I would not have thought anything different.
So it means "it is getting interesting" or "it becomes interesting"?
It does NOT mean "it is going on being interesting" (it is interesting now and will still be interesting later), right? Coming from the related German "bleiben" (in my dialect, actually: bliwe), I am familiar with "going on being interesting and still be interesting later", but obviously the meaning of "at blive" and "bleiben" is somewhat different.