Vedas state "Sarvakhalvidam Brahman" which means "Everything is Brahman." So, everything is Brahman in the absolute level. Chandogya Upanishad states:
सर्वं खल्विदं ब्रह्म तज्जलानिति शान्त उपासीत अथ खलु क्रतुमयः पुरुषो यथाक्रतुरस्मिल्लोके पुरुषो भवति तथेतः प्रेत्य भवति स क्रतुं कुर्वीतः । [Chandogya Upanishad.]
III-xiv-1: Verily, all this universe is Brahman. From Him do all things originate, into Him do they dissolve and by Him are they sustained. On Him should one meditate in tranquillity. For as is one’s faith, such
indeed one is; and as is one’s faith in this world, such one becomes on departing hence. Let one, therefore, cultivate faith.
The explanation why is it so is given in Aitreya Upanishad [2.6.1] which states :
He (the Self) wished, “Let me be many, let me be born. He undertook a deliberation. Having deliberated, he created all this that exists. That (Brahman), having created (that), entered into that very thing. And
having entered there, It became the formed and the formless, the defined and the undefined, the sustaining and the non-sustaining, the sentient and the insentient, the true and the untrue. Truth became all
this that there is. They call that Brahman Truth. Pertaining to this, there occurs this verse. In the beginning all this was but the Unmanifested (Brahman). From that emerged the manifested. That Brahman created Itself by Itself. Therefore It is called the self-creator.
For the statements from Veda Samhitas itself, the best place would be look at the Sri Rudram hymn of YajurVeda which establishes omnipresence of Brahman by so many verses. 16th chapter of Shukla YajurVeda or 4.5.1 -4.5.11 of Krishna YajurVeda is the Sri Rudram hymn. Sri Rudram calls Brahman by the name of Rudra. The relevant verses from that hymn are:
नमः काट्याय च नीप्याय च । नमस्सूद्याय च सरस्याय च ।
नमो नाद्याय च वैशन्ताय च । नमः कूप्याय चावट्याय च ।
नमो वर्ष्याय चावर्ष्याय च । नमो मेघ्याय च विद्युत्याय च ।
नम ईध्रियाय चातप्याय च । [YajurVeda 4.5.7]
Salutations to him [Rudra] who is in canal water to him who is in streams. Salutations to him who is in water of a pool and to him who is in the water of a lake. Salutations to him who is in the water of river and to him who is in the water of the pond. Salutations to him who is in the water of well and to him who is in the water of spring. Salutations to him who is in the clouds and who is also in lightning.
नमो गोष्ठ्याय च गृह्याय च । नमस्तल्प्याय च गेह्याय च ।
नमः काट्याय च गह्वरेष्ठाय च । नमो हृदय्याय च निवेष्प्याय च । नमः पाँसव्याय च रजस्याय च । नमः शुष्क्याय च हरित्याय च । नमो लोप्याय चोलप्याय च ।
नम ऊर्व्याय च सूर्म्याय च । नमः पर्ण्याय च पर्णशद्याय च । [Yajurveda 4.5.9]
Salutations to him [Rudra] who is of the form of one who lives in stable and to him who lives
in homes. Salutations to him who sits on the cot and to him who lives in ornamental houses. Salutations to him who lives in thorny bushes and who lives in caves. Salutations to him who is in deep still waters and to him who is in snow drops. Salutations to him who is in speck of dust and who is in the dust from mud. Salutations to him who is in dried piece of wood and who is in wet stem. Salutations to him who is in firm floor and who is on turf. Salutations to him who is on flat land and to him who is on tides in the river. Salutations to him who is in green leaves and who is in dried leaves.
And the 3rd Anuvaka states:
नमः ककुभाय निषङ्गिणे स्तेनानां पतये नमः । नमो निषङ्गिण इषुधिमते तस्कराणां पतये नमः । नमो वञ्चते परिवञ्चते स्तायूनां पतये नमः । नमो निचेरवे परिचरायरण्यानां पतये नमः । नमः सृकाविभ्यो जिघांसद्भ्यो मुष्णतां पतये नमः । नमोसिमद्भ्यो नक्तंचरद्भ्यः प्रकृन्तानां पतये नमः । नम उष्णीषिणे गिरिचराय कुलुञ्चानां पतये नमः । [YajurVeda 4.5.3]
Salutations and salutations, To him [Rudra] who is the best, To him who holds the sword, And to him who is the leader of the thieves. Salutations and salutations, To him who holds bows ready to shoot, To him who has the quiver, And to him who is the leader of the dacoits. Salutations and salutations, To him who cheats, To him who is the greatest cheat, And to him who is leader of those who steal by cheating. Salutations and salutations, To him who goes inside to steal, To him who goes outside
to steal, And to him who is the leader of thieves who steal in the forest. Salutations and salutations, To him who defends themselves with arms. To him who
troubles others, And to him who is the leader of peasants who steal from their master. Salutations and salutations, To him who holds the sword, To him who prowls in the night to steal, And to him who is the leader of those who murder and steal. Salutations and salutations, To him who wears the turban, To him who lives in the
forests, And to him who is the leader of those who steal in houses and fields.
So, from the above statements it is clear that everything that exists is God/Brahman himself.
We can find further statements like in Narayana Sukta of Taittaria Aranyaka YajurVeda:
यच्च किञ्चिज्जगत्यस्मिन् दृश्यते श्रूयतेऽपि वा ।
अन्तर्बहिश्च तत्सर्वं व्याप्य नारायणः स्थितः ॥ ५॥ [Taittariya Aranyaka 10.13]
Whatsoever there is in this world known through perception or known through report, all that is pervaded by Narayana within and without.
Also in Rudra Sukta of Taittariya Aranyaka:
सर्वो वै रुद्रस्तस्मै रुद्राय नमो अस्तु । पुरुषो वै रुद्रः
सन्महो नमो नमः । विश्वं भूतं भुवनं चित्रं बहुधा जातं जायमानं च यत् । सर्वो ह्येष रुद्रस्तस्मै रुद्राय नमो अस्तु ।। [Taittariya Aranyaka 10.24]
All this verily is Rudra. To Rudra who is such we offer our salutation. We salute again and again that Being, Rudra, who alone is the light and the Soul of creatures. The material universe the created beings and whatever there is manifoldly and profusely created in the past and in the present in the form of the world, all that is indeed this Rudra. Salutations be to Rudra who is such
Also the Rudra Suktam states:
रुद्राय नमः कालाय नमः । [Taittariya Aranyaka 10.18]
Salutation to Rudra who is in the form of Time.
Similarly Purush Sukta states:
पुरुष एवेदं सर्वं यद्भूतं यच्च भव्यम् ।
उतामृतत्वस्येशानो यदन्नेनातिरोहति ॥२॥ [RigVeda 10.90.2]
This Puruṣa is all that yet hath been and all that is to be; The Lord of Immortality which waxes greater still by food.
Similarly YajurVeda 5.5.9 states in a single sentence as:
यो रुद्रो अग्नौ यो अप्सु य ओषधिषु ।
यो रुद्रो विश्वा भुवना विवेश तस्मै रुद्राय नमो अस्तु ।।
“The Rudra in the fire, in the waters, in the plants, the Rudra that hath entered the whole world, to that Rudra be homage”
Similarly Shwetashwatara Upanishad [3.11] States:
सर्वाननशिरोग्रीव सर्वभूतगुहाशयः ।
सर्वव्यापि स भगवान् तस्मात सर्वगत शिव।।
All faces are His faces; all heads, His heads; all necks, His necks. He dwells in the hearts of all beings. He is the all−pervading Bhagavan. Therefore He is the omnipresent Shiva.
Thus from the above Veda statements, it is clear that everything that exists is Brahman (including Time Matter Beings, etc..).
In a nutshell the Hymn of YajurVeda Sri Rudram itself summarizes it as:
नमो रथेभ्यो रथपतिभ्यश्च वो नमः नमः सुतायहन्ताय, रथकारेम्यो नमो नमःअश्वेभ्यो अश्वपतिभ्यश्चभो नमो नमः।। [YajurVeda 4.5.2,3]
Salutation to him who is chariot, who is rider of chariot, who is charioteer and who is maker of Chariot, who is the horses and lord of the horses.
Thus Brahman himself is maker of chariot, he himself is that chariot itself, he himself is the Rider of Chariot and he himself is the Charioteer and he himself is the horses of that chariot.
In other words He is both the actors, stage, performer and observer, and everything that exists.