Perhaps you should have as a secondary source the German Reclam edition that has the original text of the Nibelungenlied and a translation in modern German and an audiobook then you can hear how the original text is read.

The Reclam edition is good, reliable and inexpensive. At amazon.de you can have a look inside.

I would read it in this way:


To ús in ólden stóry / are wónders mány tóld

Of héroes rích in glóry, / of tríals mánifóld:

Of jóy and féstive gréeting, / of wéeping ánd of wóe,

Of kéenest wárriors méeting, / sháll ye nów mány a wónder knów.