How does this language(s) sound to you?

[gixajo]

despite being a totally different language it still sounds spanish to me ...something like people talking a non-indo european language with a spanish accent

They are some Basque Frenchs also, is quite easy distinguish them.

[Damião de Góis]

Don't understand anything. I can get the spanish accent sometimes on the first videos.
The french videos i get an hebrew vibe soundwise.

[gixajo]

Don't understand anything. I can get the spanish accent sometimes on the first videos.
The french videos i get an hebrew vibe soundwise.

The second video is about Basque in "Iparralde" ("Northern region" AKA France Basque Country), but they are also people from Spanish Basque Country speaking, so not all the people in that video Speak Basque with french accent.

[Damião de Góis]

The second video is about Basque in "Iparralde" ("Northern region" AKA France Basque Country), but they are also people from Spanish Basque Country speaking, so not all the people in that video Speak Basque with french accent.

Do you speak it?

[gixajo]

despite being a totally different language it still sounds spanish to me ...something like people talking a non-indo european language with a spanish accent

Castillian language phonetic is originally influenced by Basque phonetic. Castillian language was born between Álava(South Basque Country) province and North of Burgos province (Castilla y León), and firts written words were found in a monastery in La Rioja, neighbouring the Basque Country, and in the same document were found also the first words in Basque.

[Brás Garcia de Mascarenhas]

There are 3 different accents at least, most spoken in the video is a Basque with Castillian accent, then Basque with French pronunciation and another one who tends to be pronunciated as Castillian, but that has an own sound and it´s the Basque spoken buy elder people, specially in the first video older recordings. They era differences not only between dialects, but also inside people who spoke gramatically or use the same dialect vocabulary, has also different "musicality" depending zones.

The third video is about if the different dialect speakers understand the other dialect speakers easily.

Yes, among the elders there is barely any accent. Basque is their native language so they can speak it without an accent. Any similarities might be as well because the Castilian accent has some Basque influence too (often people don't know or tend to forget that).

The Castilian pronunciation was more obvious among the youngsters also because they used a few Castilian loanwords that the elders did not use ("hostia", "claro").