Help an old guy.

[Persiflage]

As an old guy who learned his stuff on pre electronic ignition and pre injection cars, modern engine bay baffle me, so your help is requested.

Clio 172 phase2. I've owned the car since it had 470 miles on the clock. Happy to say there have been no major issues. In recent years two injector issues diagnosed with my basic OBD reader.
Twice I've had a non starting issue, both times I've managed to get it started without any "positive" fix action.
At tick over my reader diagnostics it's showing #1 lambda sensor voltage fluctuating quite wildly along with #1 short term fuel trim (I'm assuming these are related).
Is this normal?

 

[JamesBryan]

Lambda voltage is meant to fluctuate.

 

[TheEvilGiraffe]

Twice I've had a non starting issue, both times I've managed to get it started without any "positive" fix action

Have a look on here for crank sensor issues .. might be worth a clean (or probably just replace).

 

[R3k1355]

Have the lambda's ever been replaced?

By now pretty much everyone has done the primary lambda, they only last so long.

 

[Persiflage]

Lambda sensors are original. TDC sensor was replaced at about seven years due to an intermittent starting issue (would occasionally not fire on first attempt but fine on second)
Both hard fault starting issues have evetually resolved themselves without any positive fix by me .... Eventually spluttering into life with a lengthy starter operation.
A question with respect to the fluctuating readings as shown on the video.
Would the fluctuating lambda output be due to the fluctuating fuel trim or vice versa?