I've listened to the five songs for Söngvakeppnin 2020 Final on YouTube a few times each today. According to Eurovision World, this is the order in which they will be performed. Here are my opinions on each one:
Ísold & Helga - "Meet Me Halfway"
A ballad. The introduction and first verse are quite gentle; somehow they remind me of Iceland's 1987 entry. The first chorus is also quite gentle. The song gets more upbeat at the start of the second verse (one minute and 15 seconds in), and the second chorus is even more upbeat. Perhaps a bit more could have been put into the bridge than "ooh oh ooh oh". The song ends with a chorus at a pace which is intermediate between the first and second choruses. A good song to open the final.
Daði & Gagnamagnið - "Think About Things"
This is a much livelier song, with a good beat throughout. Going by the English lyrics, this is clearly a love song. However, I've listened to both the Icelandic and English versions of this song on YouTube, and in all honesty, whichever of the world's languages this is sung in, I think this sounds like a pop song from the late 1970s or early 1980s, and could therefore be considered a tad dated, or behind the times, by some countries if this gets to the Eurovision Song Contest in May. This is currently the favourite to win, but you can't necessarily go by the bookmakers' odds!
Nína Dagbjört - "Echo"
A beautiful ballad. It's certainly got a good structure, with a fairly gentle first verse, a slightly more upbeat pre-chorus and quite a catchy chorus (with a fairly strong beat). Interestingly, the bridge, consisting of "Oh you hear it" three times, is very quiet; is there any reason for that? The song ends with two instances of the chorus.
Iva - "Oculis videre"
An operatic song. Operatic songs can do well at Eurovision, because Estonia's "La forza" finished 8th in the ESC 2018 Grand Final. I've heard the English and Icelandic versions of "Oculis videre". In both cases, the choruses are entirely, or include, "Oculis videre, Volentibus ero", which is Latin (according to Google Translate, it means Eye can see, I wished). Including such an ancient language, which is no longer commonly spoken, makes this a Eurovision entry with a difference. After being sung quite softly and gently, this becomes more powerful and upbeat when the line "(Oculis videre) A storm is brewing at high sea" is reached. For some mysterious reason, the final line "This is all I have to say" is spoken, rather than sung.
DIMMA - "Almyrkvi"
It looks like this will be the only entry to be sung in Icelandic tonight; the title means "Eclipses". The opening section sounds like another ballad, but from the line "Myrkur máttur slóttugur sem skuggi", this suddenly becomes a heavy rock song. I'm not a fan of heavy rock songs, but going by an English translation of the lyrics, this seems to be about someone leaving behind one's past problems and heading off in a new direction. This has clearly got a totally different message to Hatari's "Hatrið mun sigra" (Hate will prevail) last year.
After all that, it's difficult for me to decide how I'd like to rank them, or pick which one I think should represent Iceland in Rotterdam in May. It remembered, this is a national final for the Eurovision Song Contest, and the staging will inevitably play an important part. I'll be in a better position to judge the five finalists when I see the live performances this evening (if an online webcast of Söngvakeppnin 2020 is viewable from the UK tonight).