really good example of playing right on the beat, simple bass line but perfect time and tone.
I've developed my (!) approach towards any bass-lines.
No#1: Get a rhythmic-melodic template (or create) of the bass-line.
In our case, "Blue on Black," it would be a 2-measure template.
Be comfortable playing that template with a metronome (starting it slower/really slower). Feel your "issues" while playing it - "I'm rushing the third note," "I'm lagging behind on the first note of Beat 1," etc...
Learn how to properly articulate it - staccato, legato, any sliding, any hammer-ons/pull-offs, any ghost notes, notes' dynamics, its lengths, etc... Try to play it in different keys.
It would be nice to know the drum's rhythmic pattern, especially, the kick pattern.
No#2: Any changes in that "template" during different sections of the song's form - how the bass line changes variates during Intro, Verse, Chorus, Bridge, etc.?
Can you hear any rhythmic-melodic changes in the bass-line?
N.B. Follow the given - or created - bass template within one song's section. Don't start changing the "template" during this/that section of the form, unless...
(Unless, the composer or arranger specifically instructs you to do so. It rarely happens.)
Is the bass player developing the "TEMPLATE" of the same section along the song - is the bass player adding something/anything more to the existing Verse template in Verse 2, or Chorus 3?
No#3. Applying "ornaments," "runs," fill-ins, etc... How often? What kind of ornaments? Once again, practice those "nuances" with the metronome.
Any "it's-a-must" ornaments?
Are you comfortable playing those "ornaments" and getting back to playing the template on-time?
I can go on and on, but "time is of the essence."