There are many such occasions and days when Veda study is forbidden. Those are enumerated in Manu Smriti 4.101 onwards:
4.101. Let him who studies always avoid (reading) on the following occasions when the Veda-study is forbidden, and (let) him who teaches
pupils according to the prescribed rule (do it likewise).
Then the text gives a long list of ...
The story, described in the Bhavishya Parva of the Harivamsa, is related to the aftermath of Janamejaya’s sarpa satra and him having finished listening to Vaishampayana’s narration of Mahabharata and Shri Krishna’s Leela. Janamejaya performed the horse sacrifice where Indra possessed the horse and having intercourse with the queen (actually Apsara Rambha), ...
The YouTube clip is not one single hymn (suktam) from Ṛg Veda Samhitā. It contains a mix of parts of individual mantras from Ṛg Veda Samhitā and Yajur Veda.
The YouTube clip is not accurately titled. Not all the mantras are addressed to Indra. There are mantras addressed to Agni, Indrāgnī, Agnīṣomau, Ṛtavah (seasons) and Chandāmsi (meters).
However, the ...
Parva days are mentioned in Manu Smriti on multiple occasions. Here is one such instance:
4.150. Let him always offer on the Parva-days oblations to Savitri and such as avert evil omens, and on the Ashtakas and Anvashtakas let him
constantly worship the manes.
A different translation of the above verse and commentary on it can be found from here:
Indra is a position and occupied by different people at various times. Please see Narada purana for the list of manvantaras and the indra of each manvantara.
“I will first tell you about the manvantaras,” replied Sudharma.
There are fourteen such eras in one of Brahma’s days. Each such era is
ruled over by a Manu. And the gods also change from one ...
1. Did Indra know Shri Krishna as an avatara of Hari?
Yes, Indra knew that Shri Krishna was an avatar of Vishnu after the Govardhana Hill incident. The same is known from the following lines selected:
It is wonderful as well as dear for me to see that you are able to conceal the complete Vaishnava splendour within your human body, which comes out when you ...
Section X of Udyoga Parva of Mahabharata has a version of this story.
According to that, it was Vishu only who suggested Rishis and Gandharvas to propose peace offering between Indra and Vritra.
And Vishnu said, 'I am no doubt bound to do what is for your good. I shall, therefore, tell you of a contrivance whereby he may be annihilated. Do ye with the ...
The link on the youtube you are referring seems to be from some source but that is not Indra Suktha. The various versions are:
Indra Suktha is traditionally is chanted from
rigveda samhitaa, manDala 1, suktam 32
rushih hiranyastoopa aangirasa, Chanda trishTup, devataa indra
Source: Vedic secrets by T.V.Kapali Sastri and later edited by R. L. Kashyap....